diff --git a/BREAKING.md b/BREAKING.md
index a15b840256..3f015668a2 100644
--- a/BREAKING.md
+++ b/BREAKING.md
@@ -24,6 +24,7 @@ This is a comprehensive list of the breaking changes introduced in the major ver
   - [Nav](#version-8x-nav)
   - [Picker](#version-8x-picker)
   - [Progress bar](#version-8x-progress-bar)
+  - [Radio](#version-8x-radio)
   - [Select](#version-8x-select)
   - [Textarea](#version-8x-textarea)
   - [Toggle](#version-8x-toggle)
@@ -178,6 +179,10 @@ For more information on the dynamic font, refer to the [Dynamic Font Scaling doc
 
 For more information on styling toast buttons, refer to the [Toast Theming documentation](https://ionicframework.com/docs/api/toast#theming).
 
+<h4 id="version-8x-radio">Radio</h4>
+
+- The `legacy` property and support for the legacy syntax, which involved placing an `ion-radio` inside of an `ion-item` with an `ion-label`, have been removed. For more information on migrating from the legacy radio syntax, refer to the [Radio documentation](https://ionicframework.com/docs/api/radio#migrating-from-legacy-radio-syntax).
+
 <h4 id="version-8x-select">Select</h4>
 
 - The `legacy` property and support for the legacy syntax, which involved placing an `ion-select` inside of an `ion-item` with an `ion-label`, have been removed. For more information on migrating from the legacy select syntax, refer to the [Select documentation](https://ionicframework.com/docs/api/select#migrating-from-legacy-select-syntax).
diff --git a/core/api.txt b/core/api.txt
index 7b3fb11a20..c79d645c2a 100644
--- a/core/api.txt
+++ b/core/api.txt
@@ -1037,7 +1037,6 @@ ion-radio,prop,color,"danger" | "dark" | "light" | "medium" | "primary" | "secon
 ion-radio,prop,disabled,boolean,false,false,false
 ion-radio,prop,justify,"end" | "space-between" | "start",'space-between',false,false
 ion-radio,prop,labelPlacement,"end" | "fixed" | "stacked" | "start",'start',false,false
-ion-radio,prop,legacy,boolean | undefined,undefined,false,false
 ion-radio,prop,mode,"ios" | "md",undefined,false,false
 ion-radio,prop,name,string,this.inputId,false,false
 ion-radio,prop,value,any,undefined,false,false
diff --git a/core/src/components.d.ts b/core/src/components.d.ts
index 2318b26d04..9eaf6d0130 100644
--- a/core/src/components.d.ts
+++ b/core/src/components.d.ts
@@ -2253,10 +2253,6 @@ export namespace Components {
           * Where to place the label relative to the radio. `"start"`: The label will appear to the left of the radio in LTR and to the right in RTL. `"end"`: The label will appear to the right of the radio in LTR and to the left in RTL. `"fixed"`: The label has the same behavior as `"start"` except it also has a fixed width. Long text will be truncated with ellipses ("..."). `"stacked"`: The label will appear above the radio regardless of the direction. The alignment of the label can be controlled with the `alignment` property.
          */
         "labelPlacement": 'start' | 'end' | 'fixed' | 'stacked';
-        /**
-          * Set the `legacy` property to `true` to forcibly use the legacy form control markup. Ionic will only opt components in to the modern form markup when they are using either the `aria-label` attribute or the default slot that contains the label text. As a result, the `legacy` property should only be used as an escape hatch when you want to avoid this automatic opt-in behavior. Note that this property will be removed in an upcoming major release of Ionic, and all form components will be opted-in to using the modern form markup.
-         */
-        "legacy"?: boolean;
         /**
           * The mode determines which platform styles to use.
          */
@@ -4145,7 +4141,6 @@ declare global {
         new (): HTMLIonProgressBarElement;
     };
     interface HTMLIonRadioElementEventMap {
-        "ionStyle": StyleEventDetail;
         "ionFocus": void;
         "ionBlur": void;
     }
@@ -6930,10 +6925,6 @@ declare namespace LocalJSX {
           * Where to place the label relative to the radio. `"start"`: The label will appear to the left of the radio in LTR and to the right in RTL. `"end"`: The label will appear to the right of the radio in LTR and to the left in RTL. `"fixed"`: The label has the same behavior as `"start"` except it also has a fixed width. Long text will be truncated with ellipses ("..."). `"stacked"`: The label will appear above the radio regardless of the direction. The alignment of the label can be controlled with the `alignment` property.
          */
         "labelPlacement"?: 'start' | 'end' | 'fixed' | 'stacked';
-        /**
-          * Set the `legacy` property to `true` to forcibly use the legacy form control markup. Ionic will only opt components in to the modern form markup when they are using either the `aria-label` attribute or the default slot that contains the label text. As a result, the `legacy` property should only be used as an escape hatch when you want to avoid this automatic opt-in behavior. Note that this property will be removed in an upcoming major release of Ionic, and all form components will be opted-in to using the modern form markup.
-         */
-        "legacy"?: boolean;
         /**
           * The mode determines which platform styles to use.
          */
@@ -6950,10 +6941,6 @@ declare namespace LocalJSX {
           * Emitted when the radio button has focus.
          */
         "onIonFocus"?: (event: IonRadioCustomEvent<void>) => void;
-        /**
-          * Emitted when the styles change.
-         */
-        "onIonStyle"?: (event: IonRadioCustomEvent<StyleEventDetail>) => void;
         /**
           * the value of the radio.
          */
diff --git a/core/src/components/item/test/disabled/index.html b/core/src/components/item/test/disabled/index.html
index f783a0ade4..537d694951 100644
--- a/core/src/components/item/test/disabled/index.html
+++ b/core/src/components/item/test/disabled/index.html
@@ -43,12 +43,6 @@
             <ion-checkbox disabled checked> Disabled Checkbox </ion-checkbox>
           </ion-item>
 
-          <ion-radio-group value="radio">
-            <ion-item>
-              <ion-radio disabled value="radio"> Disabled Radio </ion-radio>
-            </ion-item>
-          </ion-radio-group>
-
           <ion-item>
             <ion-range disabled value="10">
               <span slot="label">Disabled Range</span>
@@ -61,18 +55,6 @@
             <ion-label>Multiple Input Disabled Items</ion-label>
           </ion-list-header>
 
-          <ion-item>
-            <ion-checkbox aria-label="Checkbox" disabled slot="start"></ion-checkbox>
-            <ion-label>Checkbox + Radio</ion-label>
-            <ion-radio aria-label="Radio" slot="end"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-checkbox aria-label="Checkbox" disabled slot="start"></ion-checkbox>
-            <ion-radio aria-label="Radio" slot="start"></ion-radio>
-            <ion-label>Checkbox + Radio</ion-label>
-          </ion-item>
-
           <ion-item>
             <ion-checkbox slot="start" aria-label="Checkbox"></ion-checkbox>
             <ion-label>Checkbox + Range</ion-label>
diff --git a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png
index a9a5e88bef..2d20397b31 100644
Binary files a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png and b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png differ
diff --git a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png
index a045486406..9cc9ec5b2e 100644
Binary files a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png and b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png differ
diff --git a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png
index 9bd3295902..c50d12e70a 100644
Binary files a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png and b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png differ
diff --git a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png
index 332dfec83c..5ec6dfb9b7 100644
Binary files a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png and b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png differ
diff --git a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png
index 7075bd58b1..66245915bd 100644
Binary files a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png and b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png differ
diff --git a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png
index c3a31fe0f0..77547997bf 100644
Binary files a/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png and b/core/src/components/item/test/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/index.html b/core/src/components/item/test/legacy/disabled/index.html
index 49b38cdb36..301b7d8829 100644
--- a/core/src/components/item/test/legacy/disabled/index.html
+++ b/core/src/components/item/test/legacy/disabled/index.html
@@ -43,13 +43,6 @@
             <ion-checkbox disabled checked slot="start" legacy="true"></ion-checkbox>
           </ion-item>
 
-          <ion-radio-group value="radio">
-            <ion-item>
-              <ion-label>Disabled Radio</ion-label>
-              <ion-radio disabled value="radio" slot="start" legacy="true"></ion-radio>
-            </ion-item>
-          </ion-radio-group>
-
           <ion-item>
             <ion-label>Disabled Range</ion-label>
             <ion-range disabled value="10" legacy="true"></ion-range>
@@ -63,14 +56,7 @@
 
           <ion-item>
             <ion-checkbox disabled slot="start" legacy="true"></ion-checkbox>
-            <ion-label>Checkbox + Radio</ion-label>
-            <ion-radio slot="end"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-checkbox disabled slot="start" legacy="true"></ion-checkbox>
-            <ion-radio slot="start"></ion-radio>
-            <ion-label>Checkbox + Radio</ion-label>
+            <ion-label>Checkbox</ion-label>
           </ion-item>
 
           <ion-item>
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png
index 000a9c184c..e7657cb3b6 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Chrome-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png
index 3d4688ce48..69c9788485 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Firefox-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png
index 7c77d983d5..781e703d84 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-ltr-Mobile-Safari-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Chrome-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Chrome-linux.png
index a267ee1563..51b0918746 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Chrome-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Chrome-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Firefox-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Firefox-linux.png
index 2367f71afa..fec2e5d723 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Firefox-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Firefox-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Safari-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Safari-linux.png
index 24cade08c1..34a853430d 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Safari-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-ios-rtl-Mobile-Safari-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png
index 46e27d9844..5d444902e7 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Chrome-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png
index 3f1fb976be..bc2b9140da 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Firefox-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png
index 67c0666ef6..67387b92b4 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-ltr-Mobile-Safari-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Chrome-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Chrome-linux.png
index 6e68f24b04..9f16167509 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Chrome-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Chrome-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Firefox-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Firefox-linux.png
index 82b91f06fb..b28d726ace 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Firefox-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Firefox-linux.png differ
diff --git a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Safari-linux.png b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Safari-linux.png
index 13287c8474..4f9486ac6f 100644
Binary files a/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Safari-linux.png and b/core/src/components/item/test/legacy/disabled/item.e2e.ts-snapshots/item-disabled-diff-md-rtl-Mobile-Safari-linux.png differ
diff --git a/core/src/components/radio-group/test/legacy/basic/index.html b/core/src/components/radio-group/test/legacy/basic/index.html
deleted file mode 100644
index 5b690307e3..0000000000
--- a/core/src/components/radio-group/test/legacy/basic/index.html
+++ /dev/null
@@ -1,56 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" dir="ltr">
-  <head>
-    <meta charset="UTF-8" />
-    <title>Radio Group - Basic</title>
-    <meta
-      name="viewport"
-      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
-    />
-    <link href="../../../../../css/ionic.bundle.css" rel="stylesheet" />
-    <link href="../../../../../scripts/testing/styles.css" rel="stylesheet" />
-    <script src="../../../../../scripts/testing/scripts.js"></script>
-    <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
-    <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
-  </head>
-
-  <body>
-    <ion-app>
-      <ion-header>
-        <ion-toolbar>
-          <ion-title>Radio Group - Basic</ion-title>
-        </ion-toolbar>
-      </ion-header>
-
-      <ion-content>
-        <ion-list>
-          <ion-radio-group name="items" id="group" value="1">
-            <ion-list-header>
-              <ion-label>Radio Group Header</ion-label>
-            </ion-list-header>
-
-            <ion-item>
-              <ion-label>Item 1</ion-label>
-              <ion-radio value="1" slot="start"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Item 2</ion-label>
-              <ion-radio value="2" slot="start"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Item 3</ion-label>
-              <ion-radio value="3" slot="start"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Item 4</ion-label>
-              <ion-radio value="4" slot="start"></ion-radio>
-            </ion-item>
-          </ion-radio-group>
-        </ion-list>
-      </ion-content>
-    </ion-app>
-  </body>
-</html>
diff --git a/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts b/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts
deleted file mode 100644
index 470ce52bcc..0000000000
--- a/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts
+++ /dev/null
@@ -1,163 +0,0 @@
-import { expect } from '@playwright/test';
-import type { Locator } from '@playwright/test';
-import { configs, test } from '@utils/test/playwright';
-import type { E2EPage } from '@utils/test/playwright';
-
-configs().forEach(({ title, screenshot, config }) => {
-  test.describe(title('radio-group: basic'), () => {
-    test('should not have visual regressions', async ({ page }) => {
-      await page.goto(`/src/components/radio-group/test/legacy/basic`, config);
-
-      const list = page.locator('ion-list');
-
-      await expect(list).toHaveScreenshot(screenshot(`radio-group-diff`));
-    });
-  });
-});
-
-/**
- * This behavior does not vary across modes/directions.
- */
-configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
-  test.describe(title('radio-group: interaction'), () => {
-    let radioFixture: RadioFixture;
-
-    test.beforeEach(({ page }) => {
-      radioFixture = new RadioFixture(page);
-    });
-
-    test('spacebar should not deselect without allowEmptySelection', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group value="one" allow-empty-selection="false">
-          <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      await radioFixture.checkRadio('keyboard');
-      await radioFixture.expectChecked(true);
-    });
-
-    test('spacebar should deselect with allowEmptySelection', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group value="one" allow-empty-selection="true">
-          <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      await radioFixture.checkRadio('keyboard');
-      await radioFixture.expectChecked(false);
-    });
-
-    test('click should not deselect without allowEmptySelection', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group value="one" allow-empty-selection="false">
-          <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      await radioFixture.checkRadio('mouse');
-      await radioFixture.expectChecked(true);
-    });
-
-    test('click should deselect with allowEmptySelection', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group value="one" allow-empty-selection="true">
-          <ion-item>
-            <ion-label>One</ion-label>
-            <ion-radio id="one" value="one"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      await radioFixture.checkRadio('mouse');
-      await radioFixture.expectChecked(false);
-    });
-
-    test('programmatically assigning a value should update the checked radio', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group value="1">
-          <ion-item>
-            <ion-label>Item 1</ion-label>
-            <ion-radio value="1" slot="start"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Item 2</ion-label>
-            <ion-radio value="2" slot="start"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Item 3</ion-label>
-            <ion-radio value="3" slot="start"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      const radioGroup = page.locator('ion-radio-group');
-      const radioOne = page.locator('ion-radio[value="1"]');
-      const radioTwo = page.locator('ion-radio[value="2"]');
-
-      await radioGroup.evaluate((el: HTMLIonRadioGroupElement) => (el.value = '2'));
-
-      await page.waitForChanges();
-
-      await expect(radioOne).not.toHaveClass(/radio-checked/);
-      await expect(radioTwo).toHaveClass(/radio-checked/);
-    });
-  });
-});
-
-class RadioFixture {
-  readonly page: E2EPage;
-
-  private radio!: Locator;
-
-  constructor(page: E2EPage) {
-    this.page = page;
-  }
-
-  async checkRadio(method: 'keyboard' | 'mouse', selector = 'ion-radio') {
-    const { page } = this;
-    const radio = (this.radio = page.locator(selector));
-
-    if (method === 'keyboard') {
-      await radio.focus();
-      await page.keyboard.press('Space');
-    } else {
-      await radio.click();
-    }
-
-    await page.waitForChanges();
-
-    return radio;
-  }
-
-  async expectChecked(state: boolean) {
-    const { radio } = this;
-    await expect(radio.locator('input')).toHaveJSProperty('checked', state);
-  }
-}
diff --git a/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts-snapshots/radio-group-diff-ios-ltr-Mobile-Chrome-linux.png b/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts-snapshots/radio-group-diff-ios-ltr-Mobile-Chrome-linux.png
deleted file mode 100644
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diff --git a/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts-snapshots/radio-group-diff-md-ltr-Mobile-Chrome-linux.png b/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts-snapshots/radio-group-diff-md-ltr-Mobile-Chrome-linux.png
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diff --git a/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts-snapshots/radio-group-diff-md-rtl-Mobile-Safari-linux.png b/core/src/components/radio-group/test/legacy/basic/radio-group.e2e.ts-snapshots/radio-group-diff-md-rtl-Mobile-Safari-linux.png
deleted file mode 100644
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diff --git a/core/src/components/radio-group/test/legacy/form/index.html b/core/src/components/radio-group/test/legacy/form/index.html
deleted file mode 100644
index 159f8c6249..0000000000
--- a/core/src/components/radio-group/test/legacy/form/index.html
+++ /dev/null
@@ -1,114 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" dir="ltr">
-  <head>
-    <meta charset="UTF-8" />
-    <title>Radio Group - Form</title>
-    <meta
-      name="viewport"
-      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
-    />
-    <link href="../../../../../css/ionic.bundle.css" rel="stylesheet" />
-    <link href="../../../../../scripts/testing/styles.css" rel="stylesheet" />
-    <script src="../../../../../scripts/testing/scripts.js"></script>
-    <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
-    <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
-  </head>
-
-  <body>
-    <ion-app>
-      <ion-header>
-        <ion-toolbar>
-          <ion-title>Radio Group - Form</ion-title>
-        </ion-toolbar>
-      </ion-header>
-
-      <ion-content class="outer-content">
-        <form>
-          <ion-list>
-            <ion-radio-group name="tannen" id="group" value="biff">
-              <ion-list-header>
-                <ion-label>Luckiest Man On Earth</ion-label>
-              </ion-list-header>
-
-              <ion-item>
-                <ion-label
-                  >Biff
-                  <span id="biff"></span>
-                </ion-label>
-                <ion-radio value="biff" slot="start"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label
-                  >Griff
-                  <span id="griff"></span>
-                </ion-label>
-                <ion-radio value="griff" slot="start"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label
-                  >Buford
-                  <span id="buford"></span>
-                </ion-label>
-                <ion-radio value="buford" slot="start"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label>George</ion-label>
-                <ion-radio value="george" disabled slot="start"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-button type="submit">Submit</ion-button>
-              </ion-item>
-            </ion-radio-group>
-          </ion-list>
-        </form>
-
-        <p style="margin: 20px">
-          Value:
-          <span id="value"></span>
-        </p>
-
-        <p style="margin: 20px">
-          Changes:
-          <span id="changes">0</span>
-        </p>
-      </ion-content>
-
-      <style>
-        .outer-content {
-          --background: #f2f2f2;
-        }
-      </style>
-      <script>
-        var changes = 0;
-
-        document.getElementById('group').addEventListener('ionChange', function (ev) {
-          document.getElementById('value').textContent = ev.detail.value;
-          changes++;
-          document.getElementById('changes').textContent = changes;
-        });
-
-        var biff = 0;
-        document.querySelector('[value="biff"]').addEventListener('ionSelect', function (ev) {
-          biff++;
-          document.getElementById('biff').textContent = biff;
-        });
-
-        var griff = 0;
-        document.querySelector('[value="griff"]').addEventListener('ionSelect', function (ev) {
-          griff++;
-          document.getElementById('griff').textContent = griff;
-        });
-
-        var buford = 0;
-        document.querySelector('[value="buford"]').addEventListener('ionSelect', function (ev) {
-          buford++;
-          document.getElementById('buford').textContent = buford;
-        });
-      </script>
-    </ion-app>
-  </body>
-</html>
diff --git a/core/src/components/radio-group/test/legacy/form/radio-group.e2e.ts b/core/src/components/radio-group/test/legacy/form/radio-group.e2e.ts
deleted file mode 100644
index 72e3811d1c..0000000000
--- a/core/src/components/radio-group/test/legacy/form/radio-group.e2e.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import { expect } from '@playwright/test';
-import { configs, test } from '@utils/test/playwright';
-
-configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
-  test.describe(title('radio-group: form'), () => {
-    test.beforeEach(async ({ page }) => {
-      await page.goto('/src/components/radio-group/test/legacy/form', config);
-    });
-
-    test('selecting an option should update the value', async ({ page }) => {
-      const radioGroup = page.locator('ion-radio-group');
-      const ionChange = await page.spyOnEvent('ionChange');
-      const griffRadio = page.locator('ion-radio[value="griff"]');
-      await expect(radioGroup).toHaveAttribute('value', 'biff');
-
-      await griffRadio.click();
-      await page.waitForChanges();
-
-      await expect(ionChange).toHaveReceivedEventDetail({ value: 'griff', event: { isTrusted: true } });
-    });
-
-    test('selecting a disabled option should not update the value', async ({ page }) => {
-      const value = page.locator('#value');
-      const disabledRadio = page.locator('ion-radio[value="george"]');
-
-      await expect(value).toHaveText('');
-      await expect(disabledRadio).toHaveAttribute('disabled', '');
-
-      await disabledRadio.click({ force: true });
-      await page.waitForChanges();
-
-      await expect(value).toHaveText('');
-    });
-  });
-});
diff --git a/core/src/components/radio-group/test/legacy/search/index.html b/core/src/components/radio-group/test/legacy/search/index.html
deleted file mode 100644
index fb0bb926f3..0000000000
--- a/core/src/components/radio-group/test/legacy/search/index.html
+++ /dev/null
@@ -1,82 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" dir="ltr">
-  <head>
-    <meta charset="UTF-8" />
-    <title>Radio Group - Search</title>
-    <meta
-      name="viewport"
-      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
-    />
-    <link href="../../../../../css/ionic.bundle.css" rel="stylesheet" />
-    <link href="../../../../../scripts/testing/styles.css" rel="stylesheet" />
-    <script src="../../../../../scripts/testing/scripts.js"></script>
-    <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
-    <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
-  </head>
-
-  <body>
-    <ion-app>
-      <ion-header>
-        <ion-toolbar>
-          <ion-title>Radio Group - Form</ion-title>
-        </ion-toolbar>
-        <ion-toolbar>
-          <ion-searchbar placeholder="Type to filter..." debounce="0"></ion-searchbar>
-        </ion-toolbar>
-        <ion-toolbar>
-          <ion-note id="value">Current value:</ion-note>
-        </ion-toolbar>
-      </ion-header>
-
-      <ion-content class="outer-content">
-        <ion-radio-group allow-empty-selection></ion-radio-group>
-      </ion-content>
-
-      <style>
-        ion-note {
-          padding: 0 10px;
-        }
-      </style>
-      <script>
-        const radioGroup = document.querySelector('ion-radio-group');
-        const searchbar = document.querySelector('ion-searchbar');
-        const currentValue = document.querySelector('#value');
-
-        radioGroup.addEventListener('ionChange', (ev) => {
-          currentValue.innerText = `Current value: ${ev.detail.value}`;
-        });
-
-        searchbar.addEventListener('ionChange', (ev) => {
-          filter(ev.detail.value);
-        });
-
-        const filter = (value) => {
-          const query = value != null ? value.toLowerCase() : '';
-          const data = [
-            { id: 0, value: 'zero' },
-            { id: 1, value: 'one' },
-            { id: 2, value: 'two' },
-            { id: 3, value: 'three' },
-          ];
-
-          let html = '';
-
-          data.forEach((d) => {
-            if (d.value.includes(query)) {
-              html += `
-              <ion-item>
-                <ion-label>Item ${d.value}</ion-label>
-                <ion-radio value="${d.value}"></ion-radio>
-              </ion-item>
-            `;
-            }
-          });
-
-          radioGroup.innerHTML = html;
-        };
-
-        filter();
-      </script>
-    </ion-app>
-  </body>
-</html>
diff --git a/core/src/components/radio-group/test/legacy/search/radio-group.e2e.ts b/core/src/components/radio-group/test/legacy/search/radio-group.e2e.ts
deleted file mode 100644
index ec40c75605..0000000000
--- a/core/src/components/radio-group/test/legacy/search/radio-group.e2e.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-import { expect } from '@playwright/test';
-import { configs, test } from '@utils/test/playwright';
-
-/**
- * This behavior does not var across modes/directions.
- */
-configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
-  test.describe(title('radio-group'), () => {
-    test.beforeEach(async ({ page }) => {
-      await page.goto('/src/components/radio-group/test/legacy/search', config);
-    });
-
-    test.describe('radio-group: state', () => {
-      test('radio should remain checked after being removed/readded to the dom', async ({ page }) => {
-        const radioGroup = page.locator('ion-radio-group');
-        const radio = page.locator('ion-radio[value=two]');
-        const searchbarInput = page.locator('ion-searchbar input');
-
-        // select radio
-        await radio.click();
-        await expect(radio.locator('input')).toHaveJSProperty('checked', true);
-
-        // filter radio so it is not in DOM
-        await page.fill('ion-searchbar input', 'zero');
-        await searchbarInput.evaluate((el) => el.blur());
-        await page.waitForChanges();
-        await expect(radio).toBeHidden();
-
-        // ensure radio group has the same value
-        await expect(radioGroup).toHaveJSProperty('value', 'two');
-
-        // clear the search so the radio appears
-        await page.fill('ion-searchbar input', '');
-        await searchbarInput.evaluate((el) => el.blur());
-        await page.waitForChanges();
-
-        // ensure that the new radio instance is still checked
-        await expect(radio.locator('input')).toHaveJSProperty('checked', true);
-      });
-    });
-  });
-});
diff --git a/core/src/components/radio/radio.ios.scss b/core/src/components/radio/radio.ios.scss
index 958cad6ffe..775239a9ea 100644
--- a/core/src/components/radio/radio.ios.scss
+++ b/core/src/components/radio/radio.ios.scss
@@ -8,12 +8,6 @@
   --color-checked: #{ion-color(primary, base)};
 }
 
-// TODO FW-3125: Remove styles
-:host(.legacy-radio) {
-  width: $radio-ios-icon-width;
-  height: $radio-ios-icon-height;
-}
-
 :host(.ion-color.radio-checked) .radio-inner {
   border-color: current-color(base);
 }
@@ -69,30 +63,6 @@
   opacity: 0.2;
 }
 
-// iOS Radio Within An Item
-// -----------------------------------------
-
-:host(.in-item.legacy-radio) {
-  @include margin(
-    $radio-ios-item-end-margin-top,
-    $radio-ios-item-end-margin-end,
-    $radio-ios-item-end-margin-bottom,
-    $radio-ios-item-end-margin-start
-  );
-
-  display: block;
-  position: static;
-}
-
-:host(.in-item.legacy-radio[slot="start"]) {
-  @include margin(
-    $radio-ios-item-start-margin-top,
-    $radio-ios-item-start-margin-end,
-    $radio-ios-item-start-margin-bottom,
-    $radio-ios-item-start-margin-start
-  );
-}
-
 // Radio Native Wrapper
 // ----------------------------------------------------------------
 
diff --git a/core/src/components/radio/radio.ios.vars.scss b/core/src/components/radio/radio.ios.vars.scss
index 9d42d8ff72..459e96dd15 100644
--- a/core/src/components/radio/radio.ios.vars.scss
+++ b/core/src/components/radio/radio.ios.vars.scss
@@ -21,27 +21,3 @@ $radio-ios-icon-border-style:         solid !default;
 
 /// @prop - Opacity of the disabled radio
 $radio-ios-disabled-opacity:          $form-control-ios-disabled-opacity !default;
-
-/// @prop - Margin top of the item-start in a radio
-$radio-ios-item-start-margin-top:     8px !default;
-
-/// @prop - Margin end of the item-start in a radio
-$radio-ios-item-start-margin-end:     21px !default;
-
-/// @prop - Margin bottom of the item-start in a radio
-$radio-ios-item-start-margin-bottom:  8px !default;
-
-/// @prop - Margin start of the item-start in a radio
-$radio-ios-item-start-margin-start:   3px !default;
-
-/// @prop - Margin top of the item-end in a radio
-$radio-ios-item-end-margin-top:       8px !default;
-
-/// @prop - Margin end of the item-end in a radio
-$radio-ios-item-end-margin-end:       11px !default;
-
-/// @prop - Margin bottom of the item-end in a radio
-$radio-ios-item-end-margin-bottom:    $radio-ios-item-end-margin-top !default;
-
-/// @prop - Margin start of the item-end in a radio
-$radio-ios-item-end-margin-start:     ($item-ios-padding-start * 0.5) !default;
diff --git a/core/src/components/radio/radio.md.scss b/core/src/components/radio/radio.md.scss
index 55db7d97c9..ba6296bcbc 100644
--- a/core/src/components/radio/radio.md.scss
+++ b/core/src/components/radio/radio.md.scss
@@ -12,12 +12,6 @@
   --border-radius: #{$radio-md-icon-border-radius};
 }
 
-// TODO FW-3125: Remove this style
-:host(.legacy-radio) {
-  width: $radio-md-icon-width;
-  height: $radio-md-icon-height;
-}
-
 :host(.ion-color) .radio-inner {
   background: current-color(base);
 }
@@ -74,7 +68,6 @@
 // opacity set by its spec, while the label
 // should match the other form controls
 
-:host(.legacy-radio.radio-disabled),
 :host(.radio-disabled) .label-text-wrapper {
   opacity: $radio-md-disabled-opacity;
 }
@@ -86,10 +79,6 @@
 // Material Design Radio: Keyboard Focus
 // -----------------------------------------
 
-:host(.ion-focused.legacy-radio) .radio-icon::after {
-  @include position(-12px, null, null, -12px);
-}
-
 :host(.ion-focused) .radio-icon::after {
   @include border-radius(var(--inner-border-radius));
 
@@ -105,30 +94,6 @@
   opacity: 0.2;
 }
 
-// Material Design Radio Within An Item
-// -----------------------------------------
-
-:host(.in-item.legacy-radio) {
-  @include margin(
-    $radio-md-item-end-margin-top,
-    $radio-md-item-end-margin-end,
-    $radio-md-item-end-margin-bottom,
-    $radio-md-item-end-margin-start
-  );
-
-  display: block;
-  position: static;
-}
-
-:host(.in-item.legacy-radio[slot="start"]) {
-  @include margin(
-    $radio-md-item-start-margin-top,
-    $radio-md-item-start-margin-end,
-    $radio-md-item-start-margin-bottom,
-    $radio-md-item-start-margin-start
-  );
-}
-
 // Radio Native Wrapper
 // ----------------------------------------------------------------
 
diff --git a/core/src/components/radio/radio.md.vars.scss b/core/src/components/radio/radio.md.vars.scss
index 47a6bd81ba..1dfa6c780f 100644
--- a/core/src/components/radio/radio.md.vars.scss
+++ b/core/src/components/radio/radio.md.vars.scss
@@ -37,30 +37,6 @@ $radio-md-transition-easing:         cubic-bezier(.4, 0, .2, 1) !default;
 /// @prop - Opacity of the disabled radio label
 $radio-md-disabled-opacity:          $form-control-md-disabled-opacity !default;
 
-/// @prop - Margin top of the item-start in a radio
-$radio-md-item-start-margin-top:     11px !default;
-
-/// @prop - Margin end of the item-start in a radio
-$radio-md-item-start-margin-end:     36px !default;
-
-/// @prop - Margin bottom of the item-start in a radio
-$radio-md-item-start-margin-bottom:  10px !default;
-
-/// @prop - Margin start of the item-start in a radio
-$radio-md-item-start-margin-start:   4px !default;
-
-/// @prop - Margin top of the item-end in a radio
-$radio-md-item-end-margin-top:       9px !default;
-
-/// @prop - Margin end of the item-end in a radio
-$radio-md-item-end-margin-end:       0 !default;
-
-/// @prop - Margin bottom of the item-end in a radio
-$radio-md-item-end-margin-bottom:    $radio-md-item-end-margin-top !default;
-
-/// @prop - Margin start of the item-end in a radio
-$radio-md-item-end-margin-start:     0 !default;
-
 /// @prop - Opacity of the disabled radio
 /// This value is used because the radio color is set to
 /// `rgb(0, 0, 0, 0.60)` when enabled and we need it to be
diff --git a/core/src/components/radio/radio.scss b/core/src/components/radio/radio.scss
index 5a231acad9..0b9bc51c2d 100644
--- a/core/src/components/radio/radio.scss
+++ b/core/src/components/radio/radio.scss
@@ -15,20 +15,17 @@
 
   display: inline-block;
   position: relative;
-  box-sizing: border-box;
 
   max-width: 100%;
 
   min-height: inherit;
 
+  cursor: pointer;
+
   user-select: none;
 
   z-index: $z-index-item-input;
-}
-
-// TODO FW-3125: Remove :not selector and move styles to host
-:host(:not(.legacy-radio)) {
-  cursor: pointer;
+  box-sizing: border-box;
 }
 
 :host(.radio-disabled) {
@@ -52,17 +49,6 @@
   box-sizing: border-box;
 }
 
-// TODO FW-3125: Remove this style
-:host(.legacy-radio) label {
-  @include input-cover();
-
-  display: flex;
-
-  align-items: center;
-
-  opacity: 0;
-}
-
 input {
   @include visually-hidden();
 }
@@ -71,7 +57,7 @@ input {
   outline: none;
 }
 
-:host(.in-item:not(.legacy-radio)) {
+:host(.in-item) {
   width: 100%;
   height: 100%;
 }
@@ -82,8 +68,8 @@ input {
  * toolbar which is why we do not
  * limit the below behavior to just ion-item.
  */
-:host([slot="start"]:not(.legacy-radio)),
-:host([slot="end"]:not(.legacy-radio)) {
+:host([slot="start"]),
+:host([slot="end"]) {
   width: auto;
 }
 
@@ -116,7 +102,7 @@ input {
   overflow: hidden;
 }
 
-:host(.in-item:not(.legacy-radio)) .label-text-wrapper {
+:host(.in-item) .label-text-wrapper {
   @include margin($radio-item-label-margin-top, null, $radio-item-label-margin-bottom, null);
 }
 
diff --git a/core/src/components/radio/radio.tsx b/core/src/components/radio/radio.tsx
index d19fc34d52..079f5d52c4 100644
--- a/core/src/components/radio/radio.tsx
+++ b/core/src/components/radio/radio.tsx
@@ -1,13 +1,11 @@
 import type { ComponentInterface, EventEmitter } from '@stencil/core';
 import { Component, Element, Event, Host, Method, Prop, State, Watch, h } from '@stencil/core';
-import type { LegacyFormController } from '@utils/forms';
-import { createLegacyFormController, isOptionSelected } from '@utils/forms';
-import { addEventListener, getAriaLabel, removeEventListener } from '@utils/helpers';
-import { printIonWarning } from '@utils/logging';
+import { isOptionSelected } from '@utils/forms';
+import { addEventListener, removeEventListener } from '@utils/helpers';
 import { createColorClasses, hostContext } from '@utils/theme';
 
 import { getIonMode } from '../../global/ionic-global';
-import type { Color, StyleEventDetail } from '../../interface';
+import type { Color } from '../../interface';
 
 /**
  * @virtualProp {"ios" | "md"} mode - The mode determines which platform styles to use.
@@ -29,11 +27,6 @@ import type { Color, StyleEventDetail } from '../../interface';
 export class Radio implements ComponentInterface {
   private inputId = `ion-rb-${radioButtonIds++}`;
   private radioGroup: HTMLIonRadioGroupElement | null = null;
-  private nativeInput!: HTMLInputElement;
-  private legacyFormController!: LegacyFormController;
-
-  // This flag ensures we log the deprecation warning at most once.
-  private hasLoggedDeprecationWarning = false;
 
   @Element() el!: HTMLIonRadioElement;
 
@@ -89,18 +82,6 @@ export class Radio implements ComponentInterface {
    */
   @Prop() labelPlacement: 'start' | 'end' | 'fixed' | 'stacked' = 'start';
 
-  // TODO FW-3125: Remove the legacy property and implementation
-  /**
-   * Set the `legacy` property to `true` to forcibly use the legacy form control markup.
-   * Ionic will only opt components in to the modern form markup when they are
-   * using either the `aria-label` attribute or the default slot that contains
-   * the label text. As a result, the `legacy` property should only be used as
-   * an escape hatch when you want to avoid this automatic opt-in behavior.
-   * Note that this property will be removed in an upcoming major release
-   * of Ionic, and all form components will be opted-in to using the modern form markup.
-   */
-  @Prop() legacy?: boolean;
-
   /**
    * How to pack the label and radio within a line.
    * `"start"`: The label and radio will appear on the left in LTR and
@@ -119,12 +100,6 @@ export class Radio implements ComponentInterface {
    */
   @Prop() alignment: 'start' | 'center' = 'center';
 
-  /**
-   * Emitted when the styles change.
-   * @internal
-   */
-  @Event() ionStyle!: EventEmitter<StyleEventDetail>;
-
   /**
    * Emitted when the radio button has focus.
    */
@@ -151,7 +126,6 @@ export class Radio implements ComponentInterface {
   }
 
   connectedCallback() {
-    this.legacyFormController = createLegacyFormController(this.el);
     if (this.value === undefined) {
       this.value = this.inputId;
     }
@@ -170,31 +144,6 @@ export class Radio implements ComponentInterface {
     }
   }
 
-  componentWillLoad() {
-    this.emitStyle();
-  }
-
-  @Watch('checked')
-  @Watch('color')
-  @Watch('disabled')
-  protected styleChanged() {
-    this.emitStyle();
-  }
-
-  private emitStyle() {
-    const style: StyleEventDetail = {
-      'interactive-disabled': this.disabled,
-      // TODO(FW-3125): remove this
-      legacy: !!this.legacy,
-    };
-
-    if (this.legacyFormController.hasLegacyControl()) {
-      style['radio-checked'] = this.checked;
-    }
-
-    this.ionStyle.emit(style);
-  }
-
   private updateState = () => {
     if (this.radioGroup) {
       const { compareWith, value: radioGroupValue } = this.radioGroup;
@@ -210,18 +159,6 @@ export class Radio implements ComponentInterface {
       return;
     }
 
-    /**
-     * The legacy control uses a native input inside
-     * of the radio host, so we can set this.checked
-     * to the state of the nativeInput. RadioGroup
-     * will prevent the native input from checking if
-     * allowEmptySelection="false" by calling ev.preventDefault().
-     */
-    if (this.legacyFormController.hasLegacyControl()) {
-      this.checked = this.nativeInput.checked;
-      return;
-    }
-
     /**
      * The modern control does not use a native input
      * inside of the radio host, so we cannot rely on the
@@ -260,12 +197,6 @@ export class Radio implements ComponentInterface {
   }
 
   render() {
-    const { legacyFormController } = this;
-
-    return legacyFormController.hasLegacyControl() ? this.renderLegacyRadio() : this.renderRadio();
-  }
-
-  private renderRadio() {
     const { checked, disabled, color, el, justify, labelPlacement, hasLabel, buttonTabindex, alignment } = this;
     const mode = getIonMode(this);
     const inItem = hostContext('ion-item', el);
@@ -307,67 +238,6 @@ export class Radio implements ComponentInterface {
       </Host>
     );
   }
-
-  private renderLegacyRadio() {
-    if (!this.hasLoggedDeprecationWarning) {
-      printIonWarning(
-        `ion-radio now requires providing a label with either the default slot or the "aria-label" attribute. To migrate, remove any usage of "ion-label" and pass the label text to either the component or the "aria-label" attribute.
-
-Example: <ion-radio>Option Label</ion-radio>
-Example with aria-label: <ion-radio aria-label="Option Label"></ion-radio>
-
-Developers can use the "legacy" property to continue using the legacy form markup. This property will be removed in an upcoming major release of Ionic where this form control will use the modern form markup.`,
-        this.el
-      );
-
-      if (this.legacy) {
-        printIonWarning(
-          `ion-radio is being used with the "legacy" property enabled which will forcibly enable the legacy form markup. This property will be removed in an upcoming major release of Ionic where this form control will use the modern form markup.
-
-Developers can dismiss this warning by removing their usage of the "legacy" property and using the new radio syntax.`,
-          this.el
-        );
-      }
-
-      this.hasLoggedDeprecationWarning = true;
-    }
-
-    const { inputId, disabled, checked, color, el, buttonTabindex } = this;
-    const mode = getIonMode(this);
-    const { label, labelId, labelText } = getAriaLabel(el, inputId);
-
-    return (
-      <Host
-        aria-checked={`${checked}`}
-        aria-hidden={disabled ? 'true' : null}
-        aria-labelledby={label ? labelId : null}
-        role="radio"
-        tabindex={buttonTabindex}
-        onFocus={this.onFocus}
-        onBlur={this.onBlur}
-        onClick={this.onClick}
-        class={createColorClasses(color, {
-          [mode]: true,
-          'in-item': hostContext('ion-item', el),
-          interactive: true,
-          'radio-checked': checked,
-          'radio-disabled': disabled,
-          'legacy-radio': true,
-        })}
-      >
-        {this.renderRadioControl()}
-        <label htmlFor={inputId}>{labelText}</label>
-        <input
-          type="radio"
-          checked={checked}
-          disabled={disabled}
-          tabindex="-1"
-          id={inputId}
-          ref={(nativeEl) => (this.nativeInput = nativeEl as HTMLInputElement)}
-        />
-      </Host>
-    );
-  }
 }
 
 let radioButtonIds = 0;
diff --git a/core/src/components/radio/test/legacy/a11y/index.html b/core/src/components/radio/test/legacy/a11y/index.html
deleted file mode 100644
index 93f5edf9bb..0000000000
--- a/core/src/components/radio/test/legacy/a11y/index.html
+++ /dev/null
@@ -1,141 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" dir="ltr">
-  <head>
-    <meta charset="UTF-8" />
-    <title>Radio - a11y</title>
-    <meta
-      name="viewport"
-      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
-    />
-    <link href="../../../../../../css/ionic.bundle.css" rel="stylesheet" />
-    <link href="../../../../../../scripts/testing/styles.css" rel="stylesheet" />
-    <script src="../../../../../../scripts/testing/scripts.js"></script>
-    <script nomodule src="../../../../../../dist/ionic/ionic.js"></script>
-    <script type="module" src="../../../../../../dist/ionic/ionic.esm.js"></script>
-  </head>
-
-  <body>
-    <ion-app>
-      <ion-header>
-        <ion-toolbar>
-          <ion-title>Radio - a11y</ion-title>
-        </ion-toolbar>
-      </ion-header>
-
-      <ion-content id="content" class="outer-content">
-        <ion-list>
-          <ion-list-header>
-            <ion-label> Select a maintenance drone: </ion-label>
-          </ion-list-header>
-          <ion-radio-group id="first-group" value="huey">
-            <ion-item>
-              <ion-label>Huey</ion-label>
-              <ion-radio slot="start" value="huey"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Dewey</ion-label>
-              <ion-radio slot="start" value="dewey"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Fooey</ion-label>
-              <ion-radio slot="start" value="fooey" color="secondary" disabled></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Louie</ion-label>
-              <ion-radio slot="start" value="louie"></ion-radio>
-            </ion-item>
-          </ion-radio-group>
-        </ion-list>
-
-        <ion-list>
-          <ion-radio-group id="second-group" value="huey">
-            <ion-item>
-              <ion-label>Huey</ion-label>
-              <ion-radio slot="start" value="huey" color="danger"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Dewey</ion-label>
-              <ion-radio slot="start" value="dewey" color="secondary"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Fooey</ion-label>
-              <ion-radio slot="start" value="fooey" color="secondary" disabled></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Louie</ion-label>
-              <ion-radio slot="start" value="louie" color="tertiary"></ion-radio>
-            </ion-item>
-          </ion-radio-group>
-        </ion-list>
-
-        <div style="padding: 10px 16px">
-          <ion-radio-group value="louie">
-            <h5>Custom Labels</h5>
-            <div>
-              <ion-radio id="custom-huey" value="huey"></ion-radio>
-              <label for="custom-huey">Huey</label>
-            </div>
-            <div>
-              <ion-radio id="custom-dewey" value="dewey"></ion-radio>
-              <label for="custom-dewey">Dewey</label>
-            </div>
-            <div>
-              <ion-radio id="custom-fooey" value="fooey" disabled></ion-radio>
-              <label for="custom-fooey">Fooey</label>
-            </div>
-            <div>
-              <ion-radio id="custom-louie" value="louie"></ion-radio>
-              <label for="custom-louie">Louie</label>
-            </div>
-          </ion-radio-group>
-        </div>
-      </ion-content>
-    </ion-app>
-  </body>
-
-  <style>
-    ion-list {
-      margin-bottom: 10px !important;
-    }
-
-    .native-radio-group {
-      background: white;
-      padding: 10px 16px;
-      margin-bottom: 10px;
-    }
-
-    .native-radio-group div {
-      margin: 10px 0;
-    }
-  </style>
-
-  <script>
-    const inputs = document.querySelectorAll('ion-radio');
-
-    for (var i = 0; i < inputs.length; i++) {
-      const input = inputs[i];
-
-      input.addEventListener('ionBlur', function () {
-        console.log('Listen ionBlur: fired');
-      });
-
-      input.addEventListener('ionFocus', function () {
-        console.log('Listen ionFocus: fired');
-      });
-
-      input.addEventListener('ionChange', function (ev) {
-        console.log('Listen ionChange: fired', ev.detail);
-      });
-
-      input.addEventListener('click', function () {
-        console.log('Listen click: fired');
-      });
-    }
-  </script>
-</html>
diff --git a/core/src/components/radio/test/legacy/a11y/radio.e2e.ts b/core/src/components/radio/test/legacy/a11y/radio.e2e.ts
deleted file mode 100644
index 98ccc80a46..0000000000
--- a/core/src/components/radio/test/legacy/a11y/radio.e2e.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import { expect } from '@playwright/test';
-import { configs, test } from '@utils/test/playwright';
-
-/**
- * This behavior does not vary across modes/directions.
- */
-configs({ modes: ['ios'], directions: ['ltr'] }).forEach(({ title, config }) => {
-  test.describe(title('radio: a11y'), () => {
-    test.beforeEach(async ({ page, browserName }) => {
-      await page.goto(`/src/components/radio/test/legacy/a11y`, config);
-
-      if (browserName === 'webkit') {
-        const radio = page.locator('#first-group ion-radio').first();
-        /**
-         * Sometimes Safari does not focus the first radio.
-         * This is a workaround to ensure the first radio is focused.
-         *
-         * Wait for the first radio to be rendered before tabbing.
-         * This is necessary because the first radio may not be rendered
-         * when the page first loads.
-         *
-         * This would cause the first radio to be skipped when tabbing.
-         */
-        await radio.waitFor();
-      }
-    });
-    test('tabbing should switch between radio groups', async ({ page, pageUtils }) => {
-      const firstGroupRadios = page.locator('#first-group ion-radio');
-      const secondGroupRadios = page.locator('#second-group ion-radio');
-
-      await pageUtils.pressKeys('Tab');
-      await expect(firstGroupRadios.nth(0)).toBeFocused();
-
-      await pageUtils.pressKeys('Tab');
-      await expect(secondGroupRadios.nth(0)).toBeFocused();
-
-      await pageUtils.pressKeys('shift+Tab');
-      await expect(firstGroupRadios.nth(0)).toBeFocused();
-    });
-    test('using arrow keys should move between enabled radios within group', async ({ page, pageUtils }) => {
-      const firstGroupRadios = page.locator('#first-group ion-radio');
-
-      await pageUtils.pressKeys('Tab');
-      await expect(firstGroupRadios.nth(0)).toBeFocused();
-
-      await page.keyboard.press('ArrowDown');
-      await expect(firstGroupRadios.nth(1)).toBeFocused();
-
-      // firstGroupRadios.nth(2) is disabled so it should not receive focus.
-      await page.keyboard.press('ArrowDown');
-      await expect(firstGroupRadios.nth(3)).toBeFocused();
-
-      await page.keyboard.press('ArrowDown');
-      await expect(firstGroupRadios.nth(0)).toBeFocused();
-
-      await page.keyboard.press('ArrowUp');
-      await expect(firstGroupRadios.nth(3)).toBeFocused();
-    });
-  });
-});
diff --git a/core/src/components/radio/test/legacy/basic/index.html b/core/src/components/radio/test/legacy/basic/index.html
deleted file mode 100644
index cd92d1a7a8..0000000000
--- a/core/src/components/radio/test/legacy/basic/index.html
+++ /dev/null
@@ -1,273 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" dir="ltr">
-  <head>
-    <meta charset="UTF-8" />
-    <title>Radio - Basic</title>
-    <meta
-      name="viewport"
-      content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
-    />
-    <link href="../../../../../../css/ionic.bundle.css" rel="stylesheet" />
-    <link href="../../../../../../scripts/testing/styles.css" rel="stylesheet" />
-    <script src="../../../../../../scripts/testing/scripts.js"></script>
-    <script nomodule src="../../../../../../dist/ionic/ionic.js"></script>
-    <script type="module" src="../../../../../../dist/ionic/ionic.esm.js"></script>
-  </head>
-
-  <body>
-    <ion-app>
-      <ion-header>
-        <ion-toolbar>
-          <ion-title>Radio - Basic</ion-title>
-        </ion-toolbar>
-      </ion-header>
-
-      <ion-content id="content" class="radio-test outer-content">
-        <ion-list>
-          <ion-radio-group id="pizzaToppings">
-            <ion-item-divider>
-              <ion-label>Pizza Toppings (Unchecked Group)</ion-label>
-            </ion-item-divider>
-            <ion-item>
-              <ion-label>Pepperoni</ion-label>
-              <ion-radio slot="start" value="pepperoni" id="groupedRadio"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Sausage</ion-label>
-              <ion-radio slot="start" value="sausage"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Pineapple</ion-label>
-              <ion-radio slot="start" value="pineapple"></ion-radio>
-            </ion-item>
-          </ion-radio-group>
-          <ion-list>
-            <ion-radio-group id="fruitRadio" value="grape">
-              <ion-item-divider>
-                <ion-label>Fruits (Group w/ values)</ion-label>
-              </ion-item-divider>
-              <ion-item>
-                <ion-label>Apple</ion-label>
-                <ion-radio slot="start" value="apple"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label>Grape, checked, disabled</ion-label>
-                <ion-radio slot="start" id="grapeChecked" value="grape" disabled></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label>Cherry</ion-label>
-                <ion-radio slot="start" color="danger" value="cherry"></ion-radio>
-              </ion-item>
-            </ion-radio-group>
-
-            <ion-radio-group id="pizzaRadio" value="pepperoni">
-              <ion-item-divider>
-                <ion-label>Extra Pizza Topping (Group w/ no values)</ion-label>
-              </ion-item-divider>
-              <ion-item>
-                <ion-label>Pepperoni</ion-label>
-                <ion-radio slot="end" name="pepperoni" value="pepperoni" id="pepperoni-radio"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label>Sausage</ion-label>
-                <ion-radio slot="end" color="danger" name="sausage" value="sausage"></ion-radio>
-              </ion-item>
-            </ion-radio-group>
-
-            <ion-radio-group id="veggiesRadio" value="broccoli" allow-empty-selection>
-              <ion-item-divider>
-                <ion-label>Veggies (Group w/ allow empty)</ion-label>
-              </ion-item-divider>
-              <ion-item>
-                <ion-label>Carrot</ion-label>
-                <ion-radio slot="end" value="carrot"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label>Tomato</ion-label>
-                <ion-radio slot="end" value="tomato"></ion-radio>
-              </ion-item>
-
-              <ion-item>
-                <ion-label>Broccoli</ion-label>
-                <ion-radio id="dangerRadio" slot="end" color="danger" value="broccoli"></ion-radio>
-              </ion-item>
-            </ion-radio-group>
-
-            <ion-radio-group allow-empty-selection value="custom">
-              <ion-item-divider>
-                <ion-label>Custom (Group w/ allow empty)</ion-label>
-              </ion-item-divider>
-
-              <ion-item>
-                <ion-label>Custom</ion-label>
-                <ion-radio
-                  slot="end"
-                  color="danger"
-                  value="custom"
-                  style="--border-radius: 2px; --inner-border-radius: 10px 0px 10px 0px"
-                ></ion-radio>
-              </ion-item>
-            </ion-radio-group>
-
-            <ion-radio-group allow-empty-selection value="custom">
-              <ion-item-divider>
-                <ion-label>Part (Group w/ allow empty)</ion-label>
-              </ion-item-divider>
-
-              <ion-item>
-                <ion-label>Radio ::part</ion-label>
-                <ion-radio slot="end" value="custom" class="radio-part"></ion-radio>
-              </ion-item>
-            </ion-radio-group>
-
-            <ion-item>
-              <ion-button slot="start" onClick="toggleBoolean('grapeChecked', 'checked')" fill="outline" size="small"
-                >Checked</ion-button
-              >
-              <ion-button slot="start" onClick="toggleBoolean('grapeChecked', 'disabled')" fill="outline" size="small"
-                >Disabled</ion-button
-              >
-              <ion-button slot="end" onClick="printRadioValues()" fill="outline" size="small">Print</ion-button>
-              <ion-button
-                slot="end"
-                onClick="toggleString('dangerRadio', 'color', 'danger', 'secondary')"
-                fill="outline"
-                size="small"
-                color="danger"
-                >Color</ion-button
-              >
-            </ion-item>
-          </ion-list>
-
-          <pre id="valuesCode"></pre>
-
-          <ion-list>
-            <ion-list-header>
-              <ion-label> No Radio Group </ion-label>
-            </ion-list-header>
-            <ion-item>
-              <ion-label>Kiwi, (ionChange) Secondary color</ion-label>
-              <ion-radio slot="start" color="secondary" id="ungroupedRadio"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Checkbox right, checked, really long text that should ellipsis</ion-label>
-              <ion-radio slot="end" color="danger"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Checkbox right side</ion-label>
-              <ion-radio slot="end"></ion-radio>
-            </ion-item>
-
-            <ion-item>
-              <ion-label>Button w/ right side default icon, really long text that should ellipsis</ion-label>
-              <ion-icon name="information-circle" slot="end"></ion-icon>
-            </ion-item>
-          </ion-list>
-
-          <p>
-            <ion-radio id="standAloneChecked"></ion-radio>
-            Stand-alone checkbox:
-            <span id="standAloneCheckedSpan"></span>
-          </p>
-
-          <ion-item>
-            <ion-label>Checkbox / Toggle</ion-label>
-            <ion-radio slot="start" id="checked"></ion-radio>
-            <ion-toggle id="checked"></ion-toggle>
-          </ion-item>
-          <ion-radio-group>
-            <ion-item>
-              <ion-label>Checked</ion-label>
-              <ion-radio slot="start" checked></ion-radio>
-              <ion-toggle checked></ion-toggle>
-            </ion-item>
-          </ion-radio-group>
-          <ion-item>
-            <ion-label>Disabled</ion-label>
-            <ion-radio slot="start" disabled></ion-radio>
-            <ion-toggle disabled></ion-toggle>
-          </ion-item>
-        </ion-list>
-      </ion-content>
-
-      <script>
-        const radio = document.getElementById('pepperoni-radio');
-        if (radio) {
-          radio.addEventListener('ionSelect', (ev) => {
-            console.log(ev.detail);
-          });
-        }
-        var radioValues = ['fruitRadio', 'pizzaRadio', 'veggiesRadio'];
-        printRadioValues();
-
-        function printRadioValues() {
-          var html = 'Values:<br>';
-
-          for (var i = 0; i < radioValues.length; i++) {
-            var radio = radioValues[i];
-            var el = document.getElementById(radio);
-            html += '<span>' + radio + ': ' + el.value + ' </span><br>';
-          }
-
-          var valueEle = document.getElementById('valuesCode');
-          valueEle.innerHTML = html;
-        }
-
-        function toggleBoolean(id, prop) {
-          var el = document.getElementById(id);
-
-          var isTrue = el[prop] ? false : true;
-          el[prop] = isTrue;
-          console.debug('in toggleBoolean, setting', prop, 'to', isTrue);
-        }
-
-        function toggleString(id, prop, firstVal, secondVal) {
-          var el = document.getElementById(id);
-
-          var stringVal = el[prop] == firstVal ? secondVal : firstVal;
-          el[prop] = stringVal;
-          console.debug('in toggleString, setting', prop, 'to', stringVal);
-        }
-      </script>
-
-      <style>
-        .outer-content {
-          --background: #f2f2f2;
-        }
-
-        .radio-test pre {
-          background: #f6f6f6;
-          border: 1px solid #ddd;
-          padding: 15px 10px;
-          margin-top: -20px;
-        }
-
-        .radio-part::part(container) {
-          background: rgba(255, 0, 0, 0.3);
-          border-color: darkred;
-        }
-
-        .radio-part::part(mark) {
-          background: hotpink;
-        }
-
-        .radio-part.radio-checked::part(container) {
-          background: rgba(0, 255, 0, 0.3);
-          border-color: darkgreen;
-        }
-
-        .radio-part.radio-checked::part(mark) {
-          background: purple;
-        }
-      </style>
-    </ion-app>
-  </body>
-</html>
diff --git a/core/src/components/radio/test/legacy/basic/radio.e2e.ts b/core/src/components/radio/test/legacy/basic/radio.e2e.ts
deleted file mode 100644
index 46cb0aad1b..0000000000
--- a/core/src/components/radio/test/legacy/basic/radio.e2e.ts
+++ /dev/null
@@ -1,156 +0,0 @@
-import { expect } from '@playwright/test';
-import { configs, test } from '@utils/test/playwright';
-
-configs().forEach(({ title, screenshot, config }) => {
-  test.describe(title('radio: rendering'), () => {
-    test('should correctly render an unchecked radio group', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group>
-          <ion-item>
-            <ion-label>Pepperoni</ion-label>
-            <ion-radio slot="start" value="pepperoni"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Sausage</ion-label>
-            <ion-radio slot="start" value="sausage"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Pineapple</ion-label>
-            <ion-radio slot="start" value="pineapple"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      const radioGroup = page.locator('ion-radio-group');
-      await expect(radioGroup).toHaveScreenshot(screenshot(`radio-group-unchecked`));
-    });
-    test('should correctly render a checked radio group', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group value="sausage">
-          <ion-item>
-            <ion-label>Pepperoni</ion-label>
-            <ion-radio slot="start" value="pepperoni"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Sausage</ion-label>
-            <ion-radio slot="start" value="sausage"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Pineapple</ion-label>
-            <ion-radio slot="start" value="pineapple"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      const radioGroup = page.locator('ion-radio-group');
-      await expect(radioGroup).toHaveScreenshot(screenshot(`radio-group-checked`));
-    });
-    test('should allow shadow parts to be styled', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group value="sausage">
-          <ion-item>
-            <ion-label>Pepperoni</ion-label>
-            <ion-radio slot="start" value="pepperoni"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Sausage</ion-label>
-            <ion-radio slot="start" value="sausage"></ion-radio>
-          </ion-item>
-
-          <ion-item>
-            <ion-label>Pineapple</ion-label>
-            <ion-radio slot="start" value="pineapple"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-
-        <style>
-          ion-radio::part(container) {
-            background: rgba(255, 0, 0, 0.3);
-            border-color: darkred;
-          }
-
-          ion-radio::part(mark) {
-            background: hotpink;
-          }
-        </style>
-      `,
-        config
-      );
-
-      const radioGroup = page.locator('ion-radio-group');
-      await expect(radioGroup).toHaveScreenshot(screenshot(`radio-group-part`));
-    });
-    test('should apply color correctly', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio legacy="true" value="pepperoni" color="success"></ion-radio>
-      `,
-        config
-      );
-
-      const radio = page.locator('ion-radio');
-      await radio.click();
-      await page.waitForChanges();
-      await expect(radio).toHaveScreenshot(screenshot(`radio-color`));
-    });
-  });
-});
-
-configs({ directions: ['ltr'] }).forEach(({ title, config }) => {
-  test.describe(title('radio: interaction'), () => {
-    test('radio should be checked when activated', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio-group>
-          <ion-item>
-            <ion-label>Pepperoni</ion-label>
-            <ion-radio slot="start" value="pepperoni"></ion-radio>
-          </ion-item>
-        </ion-radio-group>
-      `,
-        config
-      );
-
-      const radio = page.locator('ion-radio');
-      const radioGroup = page.locator('ion-radio-group');
-
-      await expect(radio.locator('input')).toHaveJSProperty('checked', false);
-      await expect(radioGroup).toHaveJSProperty('value', undefined);
-
-      await radio.click();
-      await page.waitForChanges();
-
-      await expect(radio.locator('input')).toHaveJSProperty('checked', true);
-      await expect(radioGroup).toHaveJSProperty('value', 'pepperoni');
-    });
-    test('radio should be checked when activated even without a radio group', async ({ page }) => {
-      await page.setContent(
-        `
-        <ion-radio legacy="true" value="pepperoni"></ion-radio>
-      `,
-        config
-      );
-
-      const radio = page.locator('ion-radio');
-
-      await expect(radio.locator('input')).toHaveJSProperty('checked', false);
-
-      await radio.click();
-      await page.waitForChanges();
-
-      await expect(radio.locator('input')).toHaveJSProperty('checked', true);
-    });
-  });
-});
diff --git a/core/src/components/radio/test/legacy/basic/radio.e2e.ts-snapshots/radio-color-ios-ltr-Mobile-Chrome-linux.png b/core/src/components/radio/test/legacy/basic/radio.e2e.ts-snapshots/radio-color-ios-ltr-Mobile-Chrome-linux.png
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diff --git a/core/src/components/radio/test/legacy/basic/radio.e2e.ts-snapshots/radio-group-unchecked-md-rtl-Mobile-Safari-linux.png b/core/src/components/radio/test/legacy/basic/radio.e2e.ts-snapshots/radio-group-unchecked-md-rtl-Mobile-Safari-linux.png
deleted file mode 100644
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diff --git a/packages/angular/src/directives/proxies.ts b/packages/angular/src/directives/proxies.ts
index 9e7b764c58..241b146246 100644
--- a/packages/angular/src/directives/proxies.ts
+++ b/packages/angular/src/directives/proxies.ts
@@ -1578,14 +1578,14 @@ export declare interface IonProgressBar extends Components.IonProgressBar {}
 
 
 @ProxyCmp({
-  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'legacy', 'mode', 'name', 'value']
+  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'mode', 'name', 'value']
 })
 @Component({
   selector: 'ion-radio',
   changeDetection: ChangeDetectionStrategy.OnPush,
   template: '<ng-content></ng-content>',
   // eslint-disable-next-line @angular-eslint/no-inputs-metadata-property
-  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'legacy', 'mode', 'name', 'value'],
+  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'mode', 'name', 'value'],
 })
 export class IonRadio {
   protected el: HTMLElement;
diff --git a/packages/angular/standalone/src/directives/proxies.ts b/packages/angular/standalone/src/directives/proxies.ts
index 749687dce0..b366f4a1a5 100644
--- a/packages/angular/standalone/src/directives/proxies.ts
+++ b/packages/angular/standalone/src/directives/proxies.ts
@@ -1581,14 +1581,14 @@ export declare interface IonProgressBar extends Components.IonProgressBar {}
 
 @ProxyCmp({
   defineCustomElementFn: defineIonRadio,
-  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'legacy', 'mode', 'name', 'value']
+  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'mode', 'name', 'value']
 })
 @Component({
   selector: 'ion-radio',
   changeDetection: ChangeDetectionStrategy.OnPush,
   template: '<ng-content></ng-content>',
   // eslint-disable-next-line @angular-eslint/no-inputs-metadata-property
-  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'legacy', 'mode', 'name', 'value'],
+  inputs: ['alignment', 'color', 'disabled', 'justify', 'labelPlacement', 'mode', 'name', 'value'],
   standalone: true
 })
 export class IonRadio {
diff --git a/packages/vue/src/proxies.ts b/packages/vue/src/proxies.ts
index f6c51ac57e..6ad12689e1 100644
--- a/packages/vue/src/proxies.ts
+++ b/packages/vue/src/proxies.ts
@@ -605,10 +605,8 @@ export const IonRadio = /*@__PURE__*/ defineContainer<JSX.IonRadio, JSX.IonRadio
   'disabled',
   'value',
   'labelPlacement',
-  'legacy',
   'justify',
   'alignment',
-  'ionStyle',
   'ionFocus',
   'ionBlur'
 ],