CeramicSpeed ITA 30 Bottom Bracket - Black CoatedSpecifications The bearings come installed in cups, which are then threaded into the bottom bracket shell. Both have super round, super smooth CeramicSpeed balls rolling on hardened steel races. The Coated version has a metallic coating laid onto the races, making them even harder and smoother, resulting in longer life and lower drag Discipline Road, Tri, and Track BB Type ITA Italian Threaded