Shimano Deore BB52B Hollowtech II Bottom BracketFits Shimano Hollowtech II CranksetsItem SpecificationsBB/Frame InterfaceEnglishBB Shell Width (mm)73Defined Color ListSilverBB Shell Width (mm)68Bottom Bracket Shell I.D.1.37Weight73keyword searchsm-bb52keyword searchBB52Spindle Interface TypeShimano Hollowtech