DirectFit 30: for 42mm shell BB30/BBRight DirectFit frames where bearings press directly in, without cups. 30mm spindle compatible \n PressFit 4130: BB86 Road compatible left and right 7075T6 aluminum bottom bracket cups, stainless bearings. 30mm spindle compatible \n PresFit 4630: for 46mm shell BB30PF, BB386 and BBRight frames. Left and right 7075T6 aluminum bottom bracket cups, stainless bearings