XD15 bearing housed inside aluminum cups and designed for Press Fit 30 Bottom Bracket shells. This Bottom Bracket is your answer if you are running a 30 mm spindle crank in a PF4630 shell. To make sure you do in fact have a PF30 frame you would measure the width of the BB shell (68mm) and and the Internal Diameter of the BB shell (46mm). The alloy cups housing the best in class XD15 bearings make a long lasting trouble free setup for your bicycle.