More information. 30mm shaft. High quality stainless steel bearings. Designed to fit threadless 41mm press-fit bottom bracket. Suitable for road, mtb and fatbikes. For bottom bracket widths of 89.5, 92, 104.5, 107 and 121 mm. Designed to fit cranks with a 30mm axle in a 41mm Press Fit bottom bracket shell. The PF41 30mm bottom bracket does not use a threaded center tube. Weight 77g