Shimano Shimano Bottom Bracket Press Fit 86 SM-BB91-41B (Dura-Ace)

High-quality Pressfit bottom bracket cups at Dura-Ace-level.

The new bottom bracket design features low overall weight, low Q-factor and increased heel clearance. Easy to install, increased durability because of the larger bearing size. Pressfit 86 bottom bracket cups can be used with specific frames (bottom bracket size 86x41mm) for this new oversize BB standard only. All Shimano Hollowtech-II road cranksets with integrated 24mm spindle are compatible with this bottom bracket.