- Sealed chromium steel bearing with black oxide treatment on the outer surfaces of the bearing races
- AB-2050 is the upper headset bearing for Trek Speed Concept frames and has dimensions 14.2x25x6.5mm, 45×45 deg
- AB-2052 is the lower headset bearing for Trek Speed Concept frames and has dimensions 27.1x38x6.5mm 36×45 deg
- AB-2054 fits Felt TT frames and has dimensions 19x30x6.5mm 36×45 deg
| Specs: | |
|---|---|
| Description: | ACB 6805 black oxide |
| Fits: | Trek Speed Concept |
| Package: | single |
| Upper Lower: | lower |






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