Shimano Bottom Bracket BB-MT 801DESCRIPTION Shimano Deore XT Bottom Bracket Threaded Hollowtech II 68 73 mm shell width For Shimano 24mm MTB cranks, the Shimano Deore XT bottom bracket uses high quality sealed bearings and is offered in threaded and press fit options. Specifications Model No: BB MT801 Series: SLX M7100 Series Hollowtech II bottom bracket: Threaded bottom bracket type Threaded bottom bracket shell width (mm): 68 Threaded bottom bracket shell width (mm): 73