Genuine replacement parts
Get your bike back on the road with the headset parts you need.
Product details
- Trek proprietary headset components compatible with Trek Knock Block models
- Assembly includes bearing cover, frame chip & fastener
More options
| Model | Trek Knock Block Headset Upper Assembly (Bearing Cover, Frame Chip & Fastener) |
|---|---|
| Steerer outer diameter | 28.6mm (1-1/8") |
| Thickness | 10mm |