ENDURO ABEC 3 EXTERNAL BB CUP *(WRENCH-BB48-44) Wheels Mfg Double End BB Wrench, 16-notch BB tool - 48.5 / 44mm. - Bearings: Enduro ABEC 3 - Color: Gray - Bottom Bracket/Frame Interface: ISO/English or BSA Threaded (1.37 in x 24 TPI) - Bottom Bracket Shell Width(mm): 68mm - Bottom Bracket Shell I.D.: 33.6-33.9 mm - Crank Spindle Type: GXP (SRAM, Truvativ, Etc.) - Crank Spindle Diameter: 22/24mm