| Model | Trek Knock Block Headset Upper Assembly (Bearing Cover, Frame Chip & Fastener) |
|---|---|
| Steerer outer diameter | 28.6 mm (1-1/8") |
| Thickness | 10 mm |
| Model | Trek Knock Block Headset Upper Assembly (Bearing Cover, Frame Chip & Fastener) |
|---|---|
| Steerer outer diameter | 28.6 mm (1-1/8") |
| Thickness | 10 mm |