Shimano XTR SM-BB91 Press Fit Bottom Bracket Cups Dyna-Sys Compatibility

SM-BB91 Press Fit Bottom Bracket Cups

• Special fitted cups, by pressing them inside the frame
• Great looks and protection against weather influences
• Best balance of power transfer and lightweight design
86.5mm×41mm Sizing
Fit frames like Scott, Giant, etc...

For installation TL-BB12 is recommended.