Shimano Dura-Ace BB-R9100 BSA Bottom Bracket

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The Shimano Dura-Ace BB-R9100 is a lightweight Hollowtech II bottom bracket for road use, designed for 68mm BSA threaded frames and Shimano 24mm road cranksets. Its small ball bearings and advanced sealing help provide smooth rotation while keeping weight low.

Model: BB-R9100
Series: Dura-Ace
Thread Type: BSA
Shell Width: 68mm
Axle Diameter: 24mm
Weight: Approx. 65g
Compatibility: Shimano Hollowtech II road cranksets
Application: Road