The Shimano Dura-Ace R9100 is a completely redesigned road group designed for professionals. Every component in the group has been designed from the ground up to create the most innovative component group of all time.
Shimano Dura-Ace BB-R9100 bottom bracket insert. New seal and special bearings using smaller balls, ensures high durability, smooth operation and low weight.
-Compatible with Hollowtech II road cranks.
-Smaller ball bearings for smooth operation and low weight.
-New seal design for increased durability.
manufacturer code: IBBR9100I
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