Prime BB30 Bottom BracketWhen bearings have to be pressed directly into the frame, it is of the upmost importance that the bearings are of the highest quality - The bearings in this Prime BB30 Bottom Bracket are exactly that.Our bearings are highly polished so they spin smoother for longer, while the seals protect the bearings and races from dirt and debris that try to make their way in.Features: Bearing: Premium Stainless Steel Frame Type: BB30 Crank Type: SRAM (30mm) or Shimano/FSA (24mm) when used with the Prime Bottom Bracket Adaptor (PF30 - Shimano) Weight: 56gBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.