Description
The Shimano Dura-Ace BB-R9100 Bottom Bracket is system engineering at its peak. Each of the components magnifies the qualities of the others for an unparalleled level of performance. Optimizing input to maximize output. That’s how it achieves supremacy.
- Hollowtech II bottom bracket with small ball bearings for lightweight
- Advanced seal construction for smoother rotation
- Available in 68mm BSA
- Compatible with all road Hollowtech II cranks
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