Shimano Dura-Ace English 68mm BB-R91 Bottom Bracket

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  • Overview
  • Official Shimano Bottom Bracket for use with the 9100 and 9150 Dura Ace drivetrains.

    The Shimano Dura-Ace R9100 Bottom Bracket features smaller lightweight bearings and an advanced seal construction for smoother rotation and increased durability. It is


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