Wheels Manufacturing BSA Bottom Brackets for frames that accept English (BSA) threaded bottom bracketsAllows the use of cranks that use 24mm spindles such as Shimano Hollowtech II, Full Speed Ahead, RaceFace EXI etc. to be used with BSA threaded framesDurable and lightweight machined aluminum cups for outboard set upsFeatures Enduro ABEC-3 sealed bearings for smooth operation and long lifeBottom bracket is fully serviceableFor use with frames with 68mm and 73mm bottom bracket shellsIncludes: (2) BB cups with bearings, (2) Enduro Silicone dust seals, (1) 2.5mm aluminum BB cup spacers for use with 68mm wide BB shell, (1) 1.8mm aluminum BB cup spacers for use with 68mm wide BB shell, (1) 0.7mm aluminum BB cup spacers for use with 68mm wide BB shell, (2) 0.5mm crank spindle spacers, (2) 1.0mm crank spindle spacers16-notch x 48.5mm tool recommended (Not included)Item SpecificationsBB Shell Width (mm)68BB Shell Width (mm)73BB/Frame InterfaceEnglishBottom Bracket Shell I.D.1.37Defined ColorBlueSpindle Interface TypeFSA MegaExoSpindle Interface TypeRaceFace EXISpindle Interface TypeShimano Hollowtech IIWeight105 Wheels Manufacturing BSA Bottom Bracket Bottom Brackets UPC: 811079028266