ZN40-Series bearings are corrosion-resistant zinc-coated, machined steel cartridge bearings with hardened steel balls, which vastly increases the longevity of your headset.
- Compatible with 110-, 40-, and 10-Series headsets
| Item Specifications |
| Bearing I.D. (mm) |
27.25 |
| Bearing O.D. (mm) |
38 |
| Bearing Type |
Cartridge |
| Cartridge Bearing Angle |
36x45 |
| Thickness |
6.5 |
Fits Trek Speed Concept Upper
