Model: Shimano road interface: 24mm spindle shell: BB30/PF30 width: 68mm Color: black Shimano and SRAM BB30/PF30 conversion bottom brackets Shimano: designed to be a proper BB for installing Shimano Hollowtech II steel spindle cranks in either BB30 or PF30 SRAM: GXP SRAM/Truvativ/Quarq/ISIS2 steel spindle, and also Oval Concepts 400/500/700series cranks Made with Enduro bearings and high grade grease Unauthorized online sales prohibited by manufacturer