Specifically designed for installing 24.00mm spindle diameter cranks (Shimano, etc.) in Cannondale PF30A (46mm ID, 73mm wide asymmetrical BB shell) frames without the need for any adapters. The two machined aluminum cups thread together ensuring the bottom bracket remains stable in the frame, increasing bearing life, and simplifying maintenance. This means smooth operation, fast bearing replacement, and no more creaking. – Bearings: ABEC-3 – Color: Black – Bottom Bracket/Frame Interface: Cannondale PF30A – Bottom Bracket Shell Width: 73mm – Bottom Bracket Shell I.D.: 46mm – Over Bearing Width: 91mm in 73mm wide shell (dimensions include supplied silicone dust shields) – Tool Pattern: 44mm x 16 notch Note: FSA MegaExo spindles can be between 24.00mm and 24.07mm in diameter. If your FSA spindle is 24.07mm, this BB will not work! Please purchase Wheels Mfg. FSA 24.07×37 ceramic hybrid bearings separately.