Swap or replace a component

When a component reaches the end of its life — or you move it to a
different bike — keep your records accurate so wear calculations stay
right.

Components have four statuses: Installed, In Storage
(uninstalled but kept), Retired (end of life), and Wishlist
(not yet acquired). Pick the right one for the situation below.

Replacing a worn component

1. Open the old component's page.
2. Change the status to Retired (worn out / replaced) or
   In Storage (still good, just not on a bike right now).
3. Confirm the final distance and date — these freeze the
   component's service history.
4. Add the new component the normal way (see
   Add a component).
5. Set the install date and starting distance for the new part.

The old component stays in your history. Find Retired ones under
Components → Retired, In-Storage ones under In Storage.

Moving a component between bikes

Use the Transfer button on the component's detail page (don't
just edit the bike field — that bypasses transfer tracking and
breaks the wear math).

The transfer flow:

1. Open the component's detail page on the source bike.
2. Click Transfer.
3. Pick the destination bike and the transfer date.
4. We freeze the wear up to the transfer date and start a fresh
   counter on the destination bike, so cumulative lifespan stays
   correct across both bikes.

Transfers appear in the component's history alongside services and
status changes.

Component history (Alloy / Carbon)

On Alloy and above, every component has a full timeline view —
installs, services, transfers, status changes — accessible from
the component detail page. Steel users see the current state but
not the full audit trail.