BB30A

This bottom bracket is designed to interface a Shimano 24mm Hollowtech 2 Crankset (Sora, Tiagra, 105, Ultegra, Dura Ace) and Shimano Compatible (Some ROTOR and FSA) 24mm Cranksets with a bike frame that uses a BB30A Bottom Bracket (42mm Nominal Inside Diameter x 73mm wide). This type of Bottom Bracket is almost exclusively used on Cannondale bikes (CAAD and Synapse).