Raceface CINCH PF30 VUMA,CINCH,P3-CONNECT,3D+,BB30-PF30,BSA30 73mm Bottom BracketAllows the use of a CINCH 30mm spindle crankset with PF30 bottom bracket shell Standard 6806 retainer bearings Bearings are external to the BB shell resulting in a stiffer wider stance Cups are machined for a high tolerance frame fit Rubber seal located on the bearing's external side helps to reduce the risk of water penetration Installed using a standard bearing press tool