diff --git a/.changeset/item-selected-disabled.md b/.changeset/item-selected-disabled.md
new file mode 100644
index 000000000..02c829672
--- /dev/null
+++ b/.changeset/item-selected-disabled.md
@@ -0,0 +1,5 @@
+---
+'@cube-dev/ui-kit': patch
+---
+
+`Item` themes: a disabled item now keeps showing whether it is selected. The `disabled` entry in every `outline`, `outline-2` and `clear` variant used to override `selected` outright, so a disabled segmented control — `RadioGroup type="button"` most visibly — rendered every option identically with no sign of which one was active. Each of those variants gains a `selected & disabled` state that paints the brand-tinted `accent-disabled-surface` chip and its paired label instead of the neutral one, across all six themes (`special` and `current` stay in their own white-alpha / `currentcolor` registers). `type="item"` rows are unchanged — they already keep brand identity in their disabled label and pair selection with a checkmark.
diff --git a/.changeset/radio-button-item-props.md b/.changeset/radio-button-item-props.md
new file mode 100644
index 000000000..88e8c11b9
--- /dev/null
+++ b/.changeset/radio-button-item-props.md
@@ -0,0 +1,5 @@
+---
+'@cube-dev/ui-kit': minor
+---
+
+`Radio` / `Radio.Button`: a button- or tabs-type radio now accepts the full content API of the `Item` it renders, matching `ItemButton`. Newly forwarded: `descriptionPlacement`, `descriptionProps`, `keyboardShortcutProps`, `isLoading`, `loadingSlot`, `highlight`, `highlightCaseSensitive`, `highlightStyles`, `level` and `labelRef`. `description` now has a grid area to land in, so it renders in both `inline` and `block` placement, and container style props (`padding`, `gap`, `fill`, `preset`, …) apply to button-type radios instead of being dropped. A loading button radio is also disabled, so it no longer takes clicks or arrow-key selection — pass an explicit `isDisabled={false}` to opt out.
diff --git a/.storybook/preview-head.html b/.storybook/preview-head.html
index 84dcf77ba..7e1c36bc4 100644
--- a/.storybook/preview-head.html
+++ b/.storybook/preview-head.html
@@ -1,3 +1,62 @@
+<!--
+  Pin the wall clock for every story and docs page.
+
+  Anything that asks the browser what day it is renders differently tomorrow.
+  `Calendar` is the loudest case: with no value, React Aria's `useCalendarState`
+  focuses the current month and `useCalendarCell` highlights today, both read
+  from `today(timeZone)` -> `Date.now()`. So every story showing a calendar
+  (Calendar, DatePicker, DateRangePicker, PeriodPicker, and the docs pages that
+  embed them) produced a fresh Chromatic diff on each new day, and a much bigger
+  one on each new month.
+
+  The clock still ticks — it is offset to the pinned instant rather than stopped
+  — so anything measuring elapsed time keeps working (toast auto-dismiss in
+  `src/_internal/hooks/use-timer`, notification relative timestamps, React Aria's
+  own timers). Only the absolute date is fixed, which is all Chromatic needs.
+
+  This lives in `preview-head.html`, not `preview.jsx`, so it is installed
+  before the preview bundle evaluates and cannot lose a race with a module that
+  reads the clock at import time.
+
+  Storybook only — the UI Kit itself has no date override, and consumers get the
+  real clock. To move the pinned date, edit PINNED_DATE below; expect a one-time
+  Chromatic diff on every date-related story when you do.
+-->
+<script>
+  (function pinClock() {
+    // Noon UTC keeps the calendar date identical across almost every timezone,
+    // so a local Storybook and Chromatic agree on which day is highlighted.
+    var PINNED_DATE = '2025-06-15T12:00:00.000Z';
+
+    var NativeDate = window.Date;
+    var pinnedStart = NativeDate.parse(PINNED_DATE);
+    var realStart = NativeDate.now();
+
+    function pinnedNow() {
+      return pinnedStart + (NativeDate.now() - realStart);
+    }
+
+    // A Proxy rather than a subclass: `Date` is also callable without `new`
+    // (returning a string), and everything else — `Date.parse`, `Date.UTC`,
+    // `instanceof`, the prototype — passes straight through untouched.
+    window.Date = new Proxy(NativeDate, {
+      apply: function () {
+        return new NativeDate(pinnedNow()).toString();
+      },
+      construct: function (target, args, newTarget) {
+        return Reflect.construct(
+          target,
+          args.length === 0 ? [pinnedNow()] : args,
+          newTarget,
+        );
+      },
+      get: function (target, prop, receiver) {
+        return prop === 'now' ? pinnedNow : Reflect.get(target, prop, receiver);
+      },
+    });
+  })();
+</script>
+
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
 <link href="https://fonts.googleapis.com/css2?family=Inter:wght@100;200;300;400;500;600;700;800;900&display=swap" rel="stylesheet">
diff --git a/src/components/fields/RadioGroup/Radio.tsx b/src/components/fields/RadioGroup/Radio.tsx
index 981e93033..1d98532cb 100644
--- a/src/components/fields/RadioGroup/Radio.tsx
+++ b/src/components/fields/RadioGroup/Radio.tsx
@@ -1,9 +1,10 @@
 import { useFocusableRef } from '@react-spectrum/utils';
 import {
   BaseProps,
+  CONTAINER_STYLES,
+  ContainerStyleProps,
   filterBaseProps,
   OUTER_STYLES,
-  OuterStyleProps,
   tasty,
 } from '@tenphi/tasty';
 import { forwardRef, useMemo, useRef } from 'react';
@@ -38,8 +39,20 @@ const RadioButtonElement = tasty(Item, {
     preset: 't3m',
     lineHeight: '1em',
     flexGrow: 1,
-    gridTemplate:
-      '"icon prefix label suffix rightIcon actions" auto / max-content max-content max-content max-content max-content max-content',
+    // Same areas as `Item`, but every column is `max-content` — a radio button
+    // is sized by its content, not stretched like a list item. The
+    // `description` rows have to be repeated here because a plain string would
+    // replace `Item`'s whole state map and leave the description without a
+    // grid area to land in.
+    gridTemplate: {
+      '': '"icon prefix label suffix rightIcon actions" auto / max-content max-content max-content max-content max-content max-content',
+      'description=inline':
+        '"icon prefix description suffix rightIcon actions" auto / max-content max-content max-content max-content max-content max-content',
+      'description=inline & has-label':
+        '"icon prefix label suffix rightIcon actions" auto "icon prefix description suffix rightIcon actions" auto / max-content max-content max-content max-content max-content max-content',
+      'description=block':
+        '"icon prefix label suffix rightIcon actions" auto "description description description description description description" auto / max-content max-content max-content max-content max-content max-content',
+    },
     placeContent: 'center',
     shadow: {
       '': false,
@@ -161,11 +174,61 @@ const RadioLabelElement = tasty({
   styles: INLINE_LABEL_STYLES,
 });
 
+/**
+ * `Item` props a button-type radio hands straight to the `Item` it renders, so
+ * `Radio.Button` accepts the same content and presentation API as an
+ * `ItemButton`. Kept as a runtime list so a new `Item` prop only has to be
+ * added in one place.
+ *
+ * Deliberately absent:
+ * - `size`, `type`, `theme`, `isSelected`, `isDisabled`, `mods`, `styles` —
+ *   owned by the radio (they come from the prop/context/validation resolution
+ *   below).
+ * - `shape` — the radius is owned by the button-group layout below, which keeps
+ *   only the outer-side radius on the first/last radio so the group reads as one
+ *   continuous control. Forwarding `shape` would have no effect.
+ * - `htmlType`, `as`, `insideWrapper`, `showActions` — internal to `Item` /
+ *   `ItemButton`.
+ * - `actions`, `autoHideActions`, `preserveActionsSpace`,
+ *   `disableActionsFocus` — a button radio renders as a `<label>`, and a click
+ *   anywhere inside a label activates its control, so nested action buttons
+ *   would select the radio (and nested interactive content is invalid inside a
+ *   label to begin with).
+ */
+const ITEM_PROPS = [
+  'icon',
+  'rightIcon',
+  'prefix',
+  'suffix',
+  'description',
+  'descriptionPlacement',
+  'descriptionProps',
+  'tooltip',
+  'hotkeys',
+  'keyboardShortcutProps',
+  'level',
+  'isLoading',
+  'loadingSlot',
+  'highlight',
+  'highlightCaseSensitive',
+  'highlightStyles',
+  'labelRef',
+] as const;
+
+type RadioItemProps = Pick<CubeItemProps, (typeof ITEM_PROPS)[number]>;
+
 export interface CubeRadioProps
   extends BaseProps,
     AriaRadioProps,
     Omit<FieldBaseProps, 'tooltip'>,
-    OuterStyleProps {
+    /**
+     * Container style props apply to button-type radios (they style the `Item`
+     * the radio renders). A classic radio only reads the outer subset —
+     * everything else belongs to its inner circle and label.
+     */
+    ContainerStyleProps,
+    /** All of these apply to button/tabs-type radios only. */
+    RadioItemProps {
   'aria-label'?: string;
   /* The visual type of the radio button */
   type?: 'button' | 'radio';
@@ -173,20 +236,6 @@ export interface CubeRadioProps
   value?: string;
   /* Size of the button (for button type only) */
   size?: Omit<CubeItemProps['size'], 'inline'>;
-  /* Icon to display (for button type only) */
-  icon?: CubeItemProps['icon'];
-  /* Icon to display on the right (for button type only) */
-  rightIcon?: CubeItemProps['rightIcon'];
-  /* Prefix element (for button type only) */
-  prefix?: CubeItemProps['prefix'];
-  /* Suffix element (for button type only) */
-  suffix?: CubeItemProps['suffix'];
-  /* Description text (for button type only) */
-  description?: CubeItemProps['description'];
-  /* Tooltip configuration (for button type only) */
-  tooltip?: CubeItemProps['tooltip'];
-  /* Keyboard shortcut (for button type only) */
-  hotkeys?: CubeItemProps['hotkeys'];
 }
 
 function Radio(props: CubeRadioProps, ref) {
@@ -205,13 +254,6 @@ function Radio(props: CubeRadioProps, ref) {
     type,
     buttonType,
     size,
-    icon,
-    rightIcon,
-    prefix,
-    suffix,
-    description,
-    tooltip,
-    hotkeys,
     'aria-label': ariaLabel,
     form,
     ...otherProps
@@ -219,7 +261,17 @@ function Radio(props: CubeRadioProps, ref) {
 
   label = label || children;
 
-  let styles = extractStyles(otherProps, OUTER_STYLES);
+  // Only the props the caller actually passed, so an unset one keeps `Item`'s
+  // own default instead of being overridden with `undefined`.
+  const itemProps: Record<string, unknown> = {};
+
+  for (const itemPropName of ITEM_PROPS) {
+    if (itemPropName in props) {
+      itemProps[itemPropName] = (props as Record<string, unknown>)[
+        itemPropName
+      ];
+    }
+  }
 
   labelStyles = {
     ...INLINE_LABEL_STYLES,
@@ -243,6 +295,15 @@ function Radio(props: CubeRadioProps, ref) {
   let effectiveType = type ?? contextType ?? 'radio';
   let isButton = effectiveType === 'button' || effectiveType === 'tabs';
 
+  // A button radio *is* an `Item`, so it takes the same container style props an
+  // `ItemButton` does. A classic radio only exposes the outer subset: the rest
+  // would land on the wrapper that holds the circle and the label, where
+  // `padding` / `fill` / `preset` mean something entirely different.
+  let styles = extractStyles(
+    otherProps,
+    isButton ? CONTAINER_STYLES : OUTER_STYLES,
+  );
+
   // Determine effective size with priority: prop > context > default
   let effectiveSize: CubeItemProps['size'] = (size ??
     contextSize ??
@@ -261,7 +322,10 @@ function Radio(props: CubeRadioProps, ref) {
   // When buttonType is 'primary', non-selected radios use 'outline' with a
   // visual-only `selected` mod (mods.selected=true) to render the brand-tinted
   // outline+selected look — this is the only place mods.selected intentionally
-  // decouples from the aria/isSelected state.
+  // decouples from the aria/isSelected state. Suppressed while disabled: the
+  // real selected radio is then painted with the brand-tinted disabled chip
+  // (`accent-disabled-surface`), and faking `selected` on its siblings would
+  // give them the outline variant of that same chip and erase the distinction.
   let forceSelectedMod = false;
   if (effectiveType === 'tabs') {
     effectiveButtonType = 'clear';
@@ -280,7 +344,21 @@ function Radio(props: CubeRadioProps, ref) {
   }
 
   // Use context isDisabled if prop isDisabled is not explicitly set
-  let effectiveIsDisabled = isDisabled ?? contextIsDisabled ?? false;
+  let baseIsDisabled = isDisabled ?? contextIsDisabled ?? false;
+
+  // Loading has to disable the radio here, not inside `Item`. `useRadio` and the
+  // `HiddenInput` covering the button own the actual selection, so leaving it to
+  // `Item` would render a spinner on an option that still takes clicks and arrow
+  // keys. And because this component always passes a resolved `isDisabled` down,
+  // an unresolved `isLoading` would additionally read to `Item` as an explicit
+  // `isDisabled={false}` and cancel its own loading-disables-the-item rule.
+  //
+  // Same precedence as `Item` / `ItemButton`: an explicit `isDisabled={false}`
+  // still wins over loading. Button-type only — a classic radio has no spinner,
+  // so disabling it on `isLoading` would leave no visible reason why.
+  let isLoadingButton = isButton && props.isLoading === true;
+  let effectiveIsDisabled =
+    baseIsDisabled === true || (isLoadingButton && isDisabled !== false);
 
   let { isFocused, focusProps } = useFocus(
     { isDisabled: effectiveIsDisabled },
@@ -339,16 +417,13 @@ function Radio(props: CubeRadioProps, ref) {
           { includeValid: true },
         )}
         size={effectiveSize}
-        icon={icon}
-        rightIcon={rightIcon}
-        prefix={prefix}
-        suffix={suffix}
-        description={description}
-        tooltip={tooltip}
-        hotkeys={hotkeys}
+        {...itemProps}
         isSelected={isRadioSelected}
         isDisabled={isRadioDisabled}
-        mods={{ ...mods, ...(forceSelectedMod ? { selected: true } : {}) }}
+        mods={{
+          ...mods,
+          ...(forceSelectedMod && !isRadioDisabled ? { selected: true } : {}),
+        }}
         styles={styles}
         {...mergeProps(hoverProps, focusProps)}
       >
diff --git a/src/components/fields/RadioGroup/RadioGroup.docs.mdx b/src/components/fields/RadioGroup/RadioGroup.docs.mdx
index 651c80983..5ee72f58c 100644
--- a/src/components/fields/RadioGroup/RadioGroup.docs.mdx
+++ b/src/components/fields/RadioGroup/RadioGroup.docs.mdx
@@ -35,6 +35,32 @@ A radio group allows users to select exactly one option from a set of mutually e
 - **`onBlur`** `function` — Callback fired when the radio group loses focus
 - **`onFocus`** `function` — Callback fired when the radio group receives focus
 
+### Radio Properties
+
+Each option is a `Radio` (also exported as `Radio.Button`).
+
+- **`value`** `string` — The value this option contributes to the group
+- **`children`** — The option label
+- **`isDisabled`** `boolean` — Whether this option is disabled. Falls back to the group's `isDisabled`
+- **`type`** `'radio' | 'button'` — Overrides the group's visual type for this option
+- **`size`**, **`buttonType`** — Override the group's `size` / `buttonType` for this option
+
+A `button`- or `tabs`-type radio renders an [Item](/docs/content-item--docs), so it takes the same content props an [ItemButton](/docs/actions-itembutton--docs) does. These are ignored by a classic radio:
+
+- **`icon`**, **`rightIcon`** — Icons before / after the label
+- **`prefix`**, **`suffix`** — Content before / after the label
+- **`description`**, **`descriptionPlacement`**, **`descriptionProps`** — Secondary line, placed `inline` (default) or `block`
+- **`tooltip`** — Tooltip content, or `true` to show one only when the label is truncated
+- **`hotkeys`**, **`keyboardShortcutProps`** — Keyboard shortcut that selects the option, rendered as a hint
+- **`isLoading`**, **`loadingSlot`** — Replaces a slot with a spinner and disables the option
+- **`highlight`**, **`highlightCaseSensitive`**, **`highlightStyles`** — Highlights a substring of the label
+- **`level`** — Heading level for the label when `buttonType` is `card` or `header`
+- **`labelRef`** — Ref to the label element
+
+Container [style properties](#style-properties) also apply to button-type radios (they style the `Item`). A classic radio only reads the outer subset — `margin`, `width`, `height`, `flex*`, `grid*`, `place*`, `position`, `inset`, `zIndex`, `border`, `radius`, `shadow`, `outline`.
+
+`shape` and `actions` are not forwarded: the corner radius is owned by the group layout, which keeps only the outer-side radius on the first and last option so the group reads as one continuous control, and a button radio renders as a `<label>`, where a click on a nested action button would select the option.
+
 ### Base Properties
 
 Supports [Base properties](/docs/getting-started-base-properties--docs)
@@ -166,6 +192,18 @@ When using `type="button"`, you can customize the button appearance:
 </Radio.Tabs>
 ```
 
+### Rich Button Content
+
+<Story of={RadioGroupStories.ButtonGroupRichContent} />
+
+```jsx
+<Radio.ButtonGroup label="Region" defaultValue="eu">
+  <Radio value="eu" icon={<GlobeIcon />} description="Frankfurt">EU</Radio>
+  <Radio value="us" icon={<GlobeIcon />} description="Oregon" hotkeys="alt+2">US</Radio>
+  <Radio value="ap" icon={<GlobeIcon />} isLoading>AP</Radio>
+</Radio.ButtonGroup>
+```
+
 ### Custom Button Type
 
 ```jsx
diff --git a/src/components/fields/RadioGroup/RadioGroup.stories.tsx b/src/components/fields/RadioGroup/RadioGroup.stories.tsx
index e02f060d0..dc21f6c51 100644
--- a/src/components/fields/RadioGroup/RadioGroup.stories.tsx
+++ b/src/components/fields/RadioGroup/RadioGroup.stories.tsx
@@ -210,6 +210,66 @@ export const Stretched: StoryFn<CubeRadioGroupProps> = (args) => (
   </Flow>
 );
 
+// A button radio renders an `Item`, so it takes the same content props an
+// `ItemButton` does.
+export const ButtonGroupRichContent: StoryFn<CubeRadioGroupProps> = () => (
+  <Space flow="column" gap="2x" placeItems="start">
+    <Space flow="column">
+      <Title level={6}>Icons, prefix and suffix</Title>
+      <Radio.ButtonGroup defaultValue="yes" aria-label="Icons">
+        <Radio value="yes" icon={<CheckIcon />} suffix="9">
+          Yes
+        </Radio>
+        <Radio value="no" prefix="~" rightIcon={<CloseIcon />}>
+          No
+        </Radio>
+        <Radio value="maybe" icon={<ExclamationIcon />} />
+      </Radio.ButtonGroup>
+    </Space>
+    <Space flow="column">
+      <Title level={6}>Descriptions</Title>
+      <Radio.ButtonGroup size="large" defaultValue="yes" aria-label="Inline">
+        <Radio value="yes" description="Inline">
+          Yes
+        </Radio>
+        <Radio value="no" description="Inline">
+          No
+        </Radio>
+      </Radio.ButtonGroup>
+      <Radio.ButtonGroup size="large" defaultValue="yes" aria-label="Block">
+        <Radio value="yes" description="Block" descriptionPlacement="block">
+          Yes
+        </Radio>
+        <Radio value="no" description="Block" descriptionPlacement="block">
+          No
+        </Radio>
+      </Radio.ButtonGroup>
+    </Space>
+    <Space flow="column">
+      <Title level={6}>Hotkeys and loading</Title>
+      <Radio.ButtonGroup defaultValue="yes" aria-label="Misc">
+        <Radio value="yes" hotkeys="alt+1">
+          Yes
+        </Radio>
+        <Radio value="no" isLoading>
+          No
+        </Radio>
+      </Radio.ButtonGroup>
+    </Space>
+    <Space flow="column">
+      <Title level={6}>Container style props</Title>
+      <Radio.ButtonGroup defaultValue="yes" aria-label="Styled">
+        <Radio value="yes" padding="2x">
+          Yes
+        </Radio>
+        <Radio value="no" padding="2x">
+          No
+        </Radio>
+      </Radio.ButtonGroup>
+    </Space>
+  </Space>
+);
+
 // Size demonstrations
 export const ButtonGroupSizes: StoryFn<CubeRadioGroupProps> = () => (
   <Space flow="column">
@@ -409,5 +469,73 @@ export const DisabledState: StoryFn<CubeRadioGroupProps> = () => (
         <Radio value="maybe">Maybe</Radio>
       </Radio.Tabs>
     </Space>
+    {/* A disabled group still has to show which option is selected — every
+        button type carries that through its own muted register. */}
+    <Space flow="column">
+      <Title level={6}>Button Types (Disabled, "Yes" selected)</Title>
+      <Radio.ButtonGroup
+        buttonType="outline"
+        isDisabled={true}
+        defaultValue="yes"
+        aria-label="Outline (Disabled)"
+      >
+        <Radio value="yes">Yes</Radio>
+        <Radio value="no">No</Radio>
+        <Radio value="maybe">Maybe</Radio>
+      </Radio.ButtonGroup>
+      <Block fill="#surface-2" padding="1.5x" radius="1cr" width="max-content">
+        <Radio.ButtonGroup
+          buttonType="outline-2"
+          isDisabled={true}
+          defaultValue="yes"
+          aria-label="Outline 2 (Disabled)"
+        >
+          <Radio value="yes">Yes</Radio>
+          <Radio value="no">No</Radio>
+          <Radio value="maybe">Maybe</Radio>
+        </Radio.ButtonGroup>
+      </Block>
+      <Radio.ButtonGroup
+        buttonType="clear"
+        isDisabled={true}
+        defaultValue="yes"
+        aria-label="Clear (Disabled)"
+      >
+        <Radio value="yes">Yes</Radio>
+        <Radio value="no">No</Radio>
+        <Radio value="maybe">Maybe</Radio>
+      </Radio.ButtonGroup>
+      <Radio.ButtonGroup
+        buttonType="primary"
+        isDisabled={true}
+        defaultValue="yes"
+        aria-label="Primary (Disabled)"
+      >
+        <Radio value="yes">Yes</Radio>
+        <Radio value="no">No</Radio>
+        <Radio value="maybe">Maybe</Radio>
+      </Radio.ButtonGroup>
+    </Space>
+    <Space flow="column">
+      <Title level={6}>Validation Themes (Disabled, "Yes" selected)</Title>
+      <Radio.ButtonGroup
+        isValid
+        isDisabled={true}
+        defaultValue="yes"
+        aria-label="Valid (Disabled)"
+      >
+        <Radio value="yes">Yes</Radio>
+        <Radio value="no">No</Radio>
+      </Radio.ButtonGroup>
+      <Radio.ButtonGroup
+        isInvalid
+        isDisabled={true}
+        defaultValue="yes"
+        aria-label="Invalid (Disabled)"
+      >
+        <Radio value="yes">Yes</Radio>
+        <Radio value="no">No</Radio>
+      </Radio.ButtonGroup>
+    </Space>
   </Space>
 );
diff --git a/src/components/fields/RadioGroup/radio.test.tsx b/src/components/fields/RadioGroup/radio.test.tsx
index 702c1ca68..7e4f3a48b 100644
--- a/src/components/fields/RadioGroup/radio.test.tsx
+++ b/src/components/fields/RadioGroup/radio.test.tsx
@@ -40,6 +40,58 @@ describe('<Radio /> and <RadioGroup />', () => {
     expect(formInstance.getFieldValue('test')).toBe('test');
   });
 
+  it('should not select a loading button radio', async () => {
+    const { getAllByRole } = renderWithRoot(
+      <Radio.ButtonGroup aria-label="Group">
+        <Radio value="test">test</Radio>
+        <Radio value="test2" isLoading>
+          test2
+        </Radio>
+      </Radio.ButtonGroup>,
+    );
+    const radio = getAllByRole('radio');
+
+    expect(radio[1]).toBeDisabled();
+
+    await act(async () => await userEvent.click(radio[1]));
+
+    expect(radio[1]).not.toBeChecked();
+  });
+
+  it('should keep a loading button radio selectable with an explicit isDisabled={false}', async () => {
+    const { getAllByRole } = renderWithRoot(
+      <Radio.ButtonGroup aria-label="Group">
+        <Radio value="test">test</Radio>
+        <Radio value="test2" isLoading isDisabled={false}>
+          test2
+        </Radio>
+      </Radio.ButtonGroup>,
+    );
+    const radio = getAllByRole('radio');
+
+    expect(radio[1]).not.toBeDisabled();
+
+    await act(async () => await userEvent.click(radio[1]));
+
+    expect(radio[1]).toBeChecked();
+  });
+
+  it('should leave a classic radio selectable while loading', async () => {
+    const { getAllByRole } = renderWithRoot(
+      <Radio.Group aria-label="Group">
+        <Radio value="test">test</Radio>
+        <Radio value="test2" isLoading>
+          test2
+        </Radio>
+      </Radio.Group>,
+    );
+    const radio = getAllByRole('radio');
+
+    await act(async () => await userEvent.click(radio[1]));
+
+    expect(radio[1]).toBeChecked();
+  });
+
   it("Radio shouldn't work without <RadioGroup />", () => {
     const inst = vi.spyOn(console, 'error').mockImplementation(() => {});
 
diff --git a/src/data/item-themes.ts b/src/data/item-themes.ts
index 88ca941f3..516a60427 100644
--- a/src/data/item-themes.ts
+++ b/src/data/item-themes.ts
@@ -128,7 +128,9 @@ export const DEFAULT_OUTLINE_STYLES: Styles = {
   // body-composited single-layer `#primary-accent-surface.X` would be, but
   // visually almost identical and free of the overlay-snap flash on click).
   // Disabled paints the neutral `#disabled-surface` chip on top of the same
-  // base.
+  // base — or, when selected, the brand-tinted `accent-disabled-surface` one, so
+  // a disabled segmented control still shows which option is active (CUB-3912).
+  // Every `selected & disabled` entry in this file exists for that reason.
   fill: {
     '': '#surface-2 #surface-text.0',
     hovered: '#surface-2 #surface-text.03',
@@ -137,6 +139,7 @@ export const DEFAULT_OUTLINE_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-2 #primary-accent-surface.12',
     'selected & pressed': '#surface-2 #primary-accent-surface.18',
     disabled: '#surface-2 #disabled-surface',
+    'selected & disabled': '#surface-2 #primary-accent-disabled-surface',
   },
   color: {
     '': '#surface-text-soft',
@@ -145,6 +148,7 @@ export const DEFAULT_OUTLINE_STYLES: Styles = {
     selected: '#primary-accent-text-soft',
     'selected & hovered': '#primary-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#primary-accent-disabled-surface-text',
   },
 } as const;
 
@@ -160,6 +164,7 @@ export const DEFAULT_OUTLINE_2_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-3 #primary-accent-surface.12',
     'selected & pressed': '#surface-3 #primary-accent-surface.15',
     disabled: '#surface-3 #disabled-surface',
+    'selected & disabled': '#surface-3 #primary-accent-disabled-surface',
   },
 } as const;
 
@@ -182,6 +187,7 @@ export const DEFAULT_CLEAR_STYLES: Styles = {
     'selected & (hovered | focused)': '#primary-accent-surface.12',
     'selected & pressed': '#primary-accent-surface.18',
     disabled: 'transparent',
+    'selected & disabled': '#primary-accent-disabled-surface',
   },
   // Selected label mirrors LINK: soft at rest, `#primary-accent-text` on
   // hover. See DEFAULT_OUTLINE_STYLES.
@@ -192,6 +198,7 @@ export const DEFAULT_CLEAR_STYLES: Styles = {
     selected: '#primary-accent-text-soft',
     'selected & hovered': '#primary-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#primary-accent-disabled-surface-text',
   },
 } as const;
 
@@ -281,11 +288,13 @@ export const DANGER_OUTLINE_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-2 #danger-accent-surface.12',
     'selected & pressed': '#surface-2 #danger-accent-surface.18',
     disabled: '#surface-2 #disabled-surface',
+    'selected & disabled': '#surface-2 #danger-accent-disabled-surface',
   },
   color: {
     '': '#danger-accent-text-soft',
     selected: '#danger-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#danger-accent-disabled-surface-text',
   },
 } as const;
 
@@ -299,6 +308,7 @@ export const DANGER_OUTLINE_2_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-3 #danger-accent-surface.12',
     'selected & pressed': '#surface-3 #danger-accent-surface.18',
     disabled: '#surface-3 #disabled-surface',
+    'selected & disabled': '#surface-3 #danger-accent-disabled-surface',
   },
 } as const;
 
@@ -321,11 +331,13 @@ export const DANGER_CLEAR_STYLES: Styles = {
     'selected & (hovered | focused)': '#danger-accent-text.12',
     'selected & pressed': '#danger-accent-text.18',
     disabled: 'transparent',
+    'selected & disabled': '#danger-accent-disabled-surface',
   },
   color: {
     '': '#danger-accent-text-soft',
     selected: '#danger-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#danger-accent-disabled-surface-text',
   },
 } as const;
 
@@ -407,11 +419,13 @@ export const SUCCESS_OUTLINE_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-2 #success-accent-surface.12',
     'selected & pressed': '#surface-2 #success-accent-surface.18',
     disabled: '#surface-2 #disabled-surface',
+    'selected & disabled': '#surface-2 #success-accent-disabled-surface',
   },
   color: {
     '': '#success-accent-text-soft',
     selected: '#success-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#success-accent-disabled-surface-text',
   },
 } as const;
 
@@ -425,6 +439,7 @@ export const SUCCESS_OUTLINE_2_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-3 #success-accent-surface.12',
     'selected & pressed': '#surface-3 #success-accent-surface.18',
     disabled: '#surface-3 #disabled-surface',
+    'selected & disabled': '#surface-3 #success-accent-disabled-surface',
   },
 } as const;
 
@@ -445,11 +460,13 @@ export const SUCCESS_CLEAR_STYLES: Styles = {
     'selected & (hovered | focused)': '#success-accent-text.12',
     'selected & pressed': '#success-accent-text.18',
     disabled: 'transparent',
+    'selected & disabled': '#success-accent-disabled-surface',
   },
   color: {
     '': '#success-accent-text-soft',
     selected: '#success-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#success-accent-disabled-surface-text',
   },
 } as const;
 
@@ -531,11 +548,13 @@ export const WARNING_OUTLINE_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-2 #warning-accent-surface.12',
     'selected & pressed': '#surface-2 #warning-accent-surface.18',
     disabled: '#surface-2 #disabled-surface',
+    'selected & disabled': '#surface-2 #warning-accent-disabled-surface',
   },
   color: {
     '': '#warning-accent-text-soft',
     selected: '#warning-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#warning-accent-disabled-surface-text',
   },
 } as const;
 
@@ -549,6 +568,7 @@ export const WARNING_OUTLINE_2_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-3 #warning-accent-surface.12',
     'selected & pressed': '#surface-3 #warning-accent-surface.18',
     disabled: '#surface-3 #disabled-surface',
+    'selected & disabled': '#surface-3 #warning-accent-disabled-surface',
   },
 } as const;
 
@@ -569,11 +589,13 @@ export const WARNING_CLEAR_STYLES: Styles = {
     'selected & (hovered | focused)': '#warning-accent-text.12',
     'selected & pressed': '#warning-accent-text.18',
     disabled: 'transparent',
+    'selected & disabled': '#warning-accent-disabled-surface',
   },
   color: {
     '': '#warning-accent-text-soft',
     selected: '#warning-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#warning-accent-disabled-surface-text',
   },
 } as const;
 
@@ -655,11 +677,13 @@ export const NOTE_OUTLINE_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-2 #note-accent-surface.12',
     'selected & pressed': '#surface-2 #note-accent-surface.18',
     disabled: '#surface-2 #disabled-surface',
+    'selected & disabled': '#surface-2 #note-accent-disabled-surface',
   },
   color: {
     '': '#note-accent-text-soft',
     selected: '#note-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#note-accent-disabled-surface-text',
   },
 } as const;
 
@@ -673,6 +697,7 @@ export const NOTE_OUTLINE_2_STYLES: Styles = {
     'selected & (hovered | focused)': '#surface-3 #note-accent-surface.12',
     'selected & pressed': '#surface-3 #note-accent-surface.18',
     disabled: '#surface-3 #disabled-surface',
+    'selected & disabled': '#surface-3 #note-accent-disabled-surface',
   },
 } as const;
 
@@ -693,11 +718,13 @@ export const NOTE_CLEAR_STYLES: Styles = {
     'selected & (hovered | focused)': '#note-accent-text.12',
     'selected & pressed': '#note-accent-text.18',
     disabled: 'transparent',
+    'selected & disabled': '#note-accent-disabled-surface',
   },
   color: {
     '': '#note-accent-text-soft',
     selected: '#note-accent-text',
     disabled: '#disabled-surface-text',
+    'selected & disabled': '#note-accent-disabled-surface-text',
   },
 } as const;
 
@@ -811,6 +838,8 @@ export const SPECIAL_OUTLINE_STYLES: Styles = {
     'selected & (hovered | focused)': '#special-surface #white.24',
     'selected & pressed': '#special-surface #white.3',
     disabled: '#special-surface #white.04',
+    // Stays in the white-alpha register: the base here is a fixed dark tone.
+    'selected & disabled': '#special-surface #white.09',
   },
   // Mirrors the colored-theme soft→opaque pattern (`*-accent-text-soft` →
   // `*-accent-text`) using white-alpha steps: default is slightly muted so
@@ -819,6 +848,7 @@ export const SPECIAL_OUTLINE_STYLES: Styles = {
     '': '#white.8',
     selected: '#white',
     disabled: '#white.4',
+    'selected & disabled': '#white.55',
   },
 } as const;
 
@@ -986,6 +1016,7 @@ export const CURRENT_BUTTON_STYLES: Styles = {
     selected: '#current.3',
     'selected & pressed': '#current.4',
     disabled: '#current.12',
+    'selected & disabled': '#current.35',
   },
   fill: {
     '': '#current.03',
@@ -995,6 +1026,10 @@ export const CURRENT_BUTTON_STYLES: Styles = {
     'selected & (hovered | focused)': '#current.16',
     'selected & pressed': '#current.2',
     disabled: '#current.06',
+    // Alpha step rather than a brand token — `current` inherits `currentcolor`.
+    // Authored high because the disabled label already dims `currentcolor` to
+    // `.4`, and these alphas resolve against it: `.18` renders as ~.07.
+    'selected & disabled': '#current.18',
   },
   color: {
     '': '#current',