The Shimano BB-MT501 bottom bracket for Hollowtech II provides better sealing and rotation to delivery high driving efficiency. English (BSA) threaded bottom bracketFits 68 and 73mm frame bottom bracket shellsFor use with MTBAluminum threaded cups Spindle Interface Type: Shimano Hollowtech IIBottom Bracket Shell I.D.: 1.37BB Shell Width (mm): 68 , 73Defined Color: BlackBB/Frame Interface: English

Defined Color: Black. Aluminum threaded cups. For use with MTB. Fits 68 and 73mm frame bottom bracket shells. English (BSA) threaded bottom bracket.

Date First Available: November 21, 2022. Best Sellers Rank: #57,649 in Sports & Outdoors. Customer Reviews: 4.4 out of 5 stars 5 ratings 4.4 out of 5 stars. : B0BN1W9BHR. Part Number: ?EBBMT501B. Manufacturer: ?Shimano. Material: ?Steel Bearings. Color: ?Black. Brand Name: ?SHIMANO. Package Weight: ?0.34 Pounds. Item Package Dimensions L x W x H: ?9 x 4.5 x 4 inches.