Threaded bottom brackets for SRAM and Truvativ cranksets. Engineered with the right materials for the application, including sealed cartridge bearings. Drive side bearing ID is 24mm, non-drive side bearing ID is 22mm Includes two spacers that are only needed for installing a MTB crankset on a 68mm bottom bracket shell; spacers are not needed for road cranks Spindle Interface Type: SRAM/Truvativ GXP Bottom Bracket Shell I.D.: 1.37 BB Shell Width (mm): 68 mm , 73 mm BB/Frame Interface: English Weight: 106 g