diff --git a/docs/superpowers/specs/2026-05-21-chromecast-track-switching-design.md b/docs/superpowers/specs/2026-05-21-chromecast-track-switching-design.md
index 69ddebdd7..e4d42e118 100644
--- a/docs/superpowers/specs/2026-05-21-chromecast-track-switching-design.md
+++ b/docs/superpowers/specs/2026-05-21-chromecast-track-switching-design.md
@@ -139,9 +139,14 @@ thinner and gives sub-project C (the file split) a clean unit to extract.
 - **Add:** `useCastSelection` for the active selection.
 - `availableVersions` — the item's real `currentItem.MediaSources` (id, name,
   bitrate, container).
-- `availableQualities` — the bitrate-cap options, kept as a **separate axis** from
-  version; this is the real `maxStreamingBitrate` transcode cap, no longer disguised
-  as media sources.
+- `availableQualities` — the bitrate-cap options, a **separate axis** from version;
+  this is the real `maxStreamingBitrate` transcode cap, no longer disguised as media
+  sources. It reuses the app-wide `BITRATES` constant
+  (`components/BitRateSheet.tsx`) — no cast-specific list — and `BITRATES` is
+  expanded to the fuller Jellyfin Android TV bitrate ladder so every surface (cast,
+  native player, downloads) gains the extra tiers. The cast menu filters `BITRATES`
+  to tiers within the connected device's `maxVideoBitrate` (from sub-project A's
+  `detectCapabilities`), so only usable tiers are shown.
 - `availableAudioTracks` / `availableSubtitleTracks` — derived from the **selected
   version's** `MediaStreams`, not always `MediaSources[0]`.
 - Every "selected" indicator reads from `currentSelection`.
@@ -176,6 +181,11 @@ this is consistent with audio. The `pendingSelection` covers the re-buffer gap.
 | `hooks/useCastSelection.ts` | New — A3 selection state (truth + pending) |
 | `app/(auth)/casting-player.tsx` | Replace track state with `useCastSelection`; real versions + separate quality axis |
 | `components/chromecast/ChromecastSettingsMenu.tsx` | Separate Version / Quality sections; selected rows from `currentSelection` |
+| `components/BitRateSheet.tsx` | Expand the shared `BITRATES` ladder (Jellyfin Android TV tiers) |
+
+The `BITRATES` expansion is a one-array change to a shared constant. It is
+deliberately app-wide: the native player and downloads bitrate menus gain the same
+tiers, which is the requested behaviour.
 
 ## 12. Testing