- ZIPP Ceramic Bearing Upgrade Kit - 61903 - Compatible with ZR1/ZM2 hubs, Cognition Rear hubs, Cognition/76 disc front hubs, 176 all rear hubs (incl. 2 ceramic bearings)
- SRAM Model ID: HU-SPP-A0
Attributes
| Material | Ceramic |
| Number | 61903 |
| Material | Ceramic |
| Number | 61903 |
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