Specifically designed for installing 30mm spindle cranks in Cannondale PF30A (46mm ID, 73mm wide asymmetrical BB shell) framesThe two machined aluminum cups thread together ensuring the bottom bracket remains stable in the frame, increasing bearing life, and simplifying maintenanceIncludes BB with ABEC3 bearings, 2 silicone dust seals and 4 crank spacers (2 - .5mm , 2 - 1.0mm)73mmPF30A30mmAlloy158gBlack