Shimano BB91-42A Press Fit MTB Bottom Bracket XXL - 2.75" - 3.2" balancing practicality with a streamlined

balancing practicality with a streamlined profile for the bike

Designed for robust performance and secure footing across diverse off-road and touring applications

allowing for easy carry on your bike or body

Resin: organic compound for lighter riders

Shimano BB91-42A Press Fit MTB Bottom Bracket XXL - 2.75" - 3.2" balancing practicality with a streamlinedThe Shimano SM BB91 42A is a professional XTR level press fit bottom bracket designed for HollowTech II MTB cranksets. The cups are constructed from a fiber reinforced polymer, which significantly reduces the potential for creaking and prevents damage to high end frames. This maintenance free assembly features advanced sealing to keep out water and grit, ensuring smooth rotation in the worst trail conditions. It is compatible with both 89. 5mm and