Shimano Dura-Ace R9100 Hollowtech II Bottom Bracket

A great bottom bracket spins smooth and lasts for miles and miles. The Shimano Dura-Ace 9100 Bottom Bracket matches Shimano's Dura-Ace standards, meaning it's built for demanding use, and lots of it.  Shimano offers their 9100 series bottom bracket in English and Italian threaded designs, for creak-free operation.