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The Dura-Ace BB-R9100 has stood as a marker for solid, reliable bottom bracket design since Shimano embraced external bottom bracket technology early, Shimano keeps to this serviceable, reliable, and durable design.
Dura-Ace BB-R9100 Bottom Bracket
The Dura-Ace BB-R9100 has stood as a marker for solid, reliable bottom bracket design since Shimano embraced external bottom bracket technology early. As bottom bracket standards continue to multiply, Shimano keeps to this serviceable, reliable, and durable design. Improved seals make for a quieter ride and reduce drag, and the smaller friction reducing bearings that first appeared on Dura-Ace 9000 return to smooth the ride again.
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