ZTTO PF30 -24mm Bottom Bracket. For R8000,M8000,R9100 etc. most of 24mm shaft crankset. φ24/24mm Spindle Crankset. Each of our bottom bracket are manufactured for best performance and longest durability.Matching top quality components and know-how, we make sure that every bottom bracket empowers every rider with opportunities to save energy or ride faster.
