The Shimano BB-MT501 bottom bracket for Hollowtech II provides better sealing and rotation to delivery high driving efficiency.
* English (BSA) threaded bottom bracket
* Fits 68 and 73mm frame bottom bracket shells
* For use with MTB
* Aluminum threaded cups
* Spindle Interface Type: Shimano Hollowtech II
* Bottom Bracket Shell I.D.: 1.37
* BB Shell Width (mm): 68 , 73
* Defined Color: Black
* BB/Frame Interface: English