Shimano Dura-Ace R9100 Hollowtech II English Bottom Bracket Cycling Parts You go faster

You go faster

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Shimano Dura-Ace R9100 Hollowtech II English Bottom Bracket Cycling Parts You go fasterThe Shimano Dura Ace R9100 bottom bracket is the English threaded bearing unit for Hollowtech II cranksets at the top of Shimano's road lineup. Designed for frames with 68mm or 73mm BSA threaded shells, it provides smooth, low friction rotation built to Dura Ace standards. Preload adjustment is handled externally, making installation and fine tuning straightforward with a standard bottom bracket wrench. Compatible with Dura Ace and Ultegra Hollowtech