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.
- BOTTOM BRACKET WITH SMALL BALL BEARINGS FOR LIGHT WEIGHT
- ADVANCED SEAL CONSTRUCTION FOR SMOOTHER ROTATION
Series: Dura-Ace R9100
Shell Width: 68mm/70mm
Frame Compatability: English Threaded