Shimano BB-MT501 English Bottom Bracket - English, 68/73mm, Fits Hollowtech II Spindle Bike Accessories_Repair Stand The adaptive fit upper pattern

The adaptive fit upper pattern features a BOA® L6 Fit System

Engineered with moisture-wicking fibers

But just like how the finest food ingredients demand the skills of a chef to yield a truly exquisite meal

Ultra-light continuous carbon fiber layup offers just enough compliance to take the edge off without sacrificing power transfer

Shimano BB-MT501 English Bottom Bracket - English, 68/73mm, Fits Hollowtech II Spindle Bike Accessories_Repair Stand The adaptive fit upper patternThe 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 Item Specifications BB Shell Width (mm) 68 BB Shell Width (mm) 73 BB Frame Interface English Bottom Bracket Shell I. D. 1. 37 Defined Color Black Spindle Interface Type Shimano Hollowtech II