Tange Square Taper Cartridge Bottom Bracket - 73 x 113mmTange Square Taper Cartridge Bottom Bracket 73 x 113mm Top quality Tange replacement bottom bracket sealed unit to fit a standard 73mm bottom bracket size (1. 37 24TPI) Quality maintenance free sealed cartridge Designed to be used on traditional bike frames, ATB, MTB, Hybrid etc Easy fitting, with no need to adjust bearings High strength hardened JIS square taper axle Can be fitted with a standard Shimano BB cartridge tool Bottom bracket shell: 73mm