Wheels Manufacturing Pressfit 30 to Shimano Bottom Bracket The Wheels Manufacturing Pressfit 30 to Shimano Bottom Bracket allows installation of 24mm spindle (Shimano, FSA, etc. . . ) cranks into PF30 frames without the need for adapters. This handy bottom bracket is made in the USA and features Enduro ABEC 5 angular contact sealed bearings. Enduro Angular Contact (A/C) cartridge bearings are specifically designed for hubs and bottom brackets. In standard radial bearings, only 3 or 4 balls make contact during the load, at any given time. In Angular Contact (A/C) bearings, all balls are engaged and spread the force over a larger surface area, to decrease friction, and minimize wear. A dual silicone seal keeps dirt and grime out of your bearings, extending life and the need for maintenance. Features: Weight: 153g Made in the USA Choose from Black or Red anodized machined aluminum cups Enduro ABEC 5 angular contact sealed bearings Dual silicone seal keeps the contamination out for longer life Will accept current 24mm spindle (Shimano, FSA, Etc. ) cranks No adapters needed | Wheels Manufacturing | Pf30 To Shimano Bb Blk, Pf30 To 24Mm, Enduro Ac Bearings