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Hope BSA Threaded Bottom Bracket - 68/73mm For 24mm Spindle Stainless Purple ModelNumber=E2121 }Wolf Tooth 6-Bit Hex WrenchHope BSA Threaded Bottom Bracket 68 73mm For 24mm Spindle Stainless Purple. Designed to face the worst British weather has to offer Hopes threaded bottom brackets feature high quality sealed cartridge bearings and fit a variety of cranksets. TECH SPECS Bottom Bracket Shell I. D. 1. 37 BB Frame Interface English BB Shell Width (mm) 68 BB Shell Width (mm) 73 Weight 110 Spindle Interface Type Shimano Hollowtech II Spindle Interface Type FSA MegaExo