Wheels Manufacturing T47 Inboard Bottom Bracket for 22/24mm SRAM/GXP Spindles with ABEC-3 BearingsT47 Inboard threaded bottom brackets are made from machined aluminum, and thread together directly into T47 frames. Cups have internal bearings for use in BB shell widths from 68mm to 132mm. Compatible with 22 24mm stepped spindle diameter cranksets, like SRAM & Truvativ GXP Fits 68mm 132mm shell widths High quality Enduro bearings can be easily serviced or replaced Similar to standard BSA threaded cups; the drive side cup is left hand thread and the