The Trek RCS Standard Stem Bearing Top Cover finishes the top of the headset on bikes running Trek's RCS system. It sits over the stem bearing and routes brake hoses and derailleur cables neatly beneath the stem, keeping the cockpit tidy and protecting the lines from rubbing against the frame.
This cover fits 28.6 millimetre (1-1/8 inch) stems and pairs with the RCS headset assembly found on compatible Trek road and gravel models. As a replacement part, it lets riders restore a clean finish at the stem without replacing the full headset, keeping cable routing consistent with the original build.
Quick Facts
| Feature |
Specification |
| Brand |
Trek |
| Stem compatibility |
28.6mm (1-1/8") stems |
| System compatibility |
RCS headset system |
| Function |
Keeps brake hoses and cables tucked away |