Shimano SM-BB71 Bottom Bracket Press-Fit MTB 41mm Size:104.5mm-107mm Efficient Light Output-- transparent optical

Efficient Light Output-- transparent optical fiber emits stronger and uniform light outputs while consuming less energy

Adjustable Hook and Loop battery strap holds your Magicshine hard shell battery to your bike frame

in bicycle hydraulic braking systems

Fine tuned to work efficiently with both AM and Enduro shoes

100% waterproof

Shimano SM-BB71 Bottom Bracket Press-Fit MTB 41mm Size:104.5mm-107mm Efficient Light Output-- transparent opticalShimano BB71 MTB Press Fit Bottom Bracket Shimano MTB BB71 press fit bottom bracket designed to work with HollowTech II MTB cranks. Suitable for MTB bottom bracket shells with a 41mm cup diameter.