Press fit bottom bracket for 30mm BB axles in PF30 Frames, 46mm Diameter, shells. For Cinch crank systemStandard 6806 retainer bearingsBearings are external to the BB shell resulting in a stiffer wider stanceBearings are factory filled with Phil wood greaseCups are machined for a high tolerance frame fitBuilt for: XC/AM/FR/DHWeight: 106gColours: BlackCompatibilty: PF30 Shell, 46mm Shell diameter