This lightweight, sealed bearing bottom bracket is constructed using CNC machined alloy cups.Designed to be press-fitted into 46mm Internal Bottom Bracket shells.Works together with common 30mm axle size type cranks. ¢Universal 68/73mm shell¢Road or MTB fit.¢Accepts 30mm axles¢Spacers included¢Black anodised finish¢ Â Â Â Weight: 124gNote - If using with Rotor cranks. Please use original Rotor dust covers on outside face of bearing.