Token TK888 Threaded Bottom Bracket - English Shimano HollowTech II / SRAM GXP BLKToken TK888 Threaded Bottom Bracket English Shimano HollowTech II SRAM GXP Black. Tokens thread bottom brackets are extremely high quality and made for durability and smoothness by using materials such as premium high carbon steel ball bearings and X Seals that keep dirt and water out. Premium Bearings are high carbon steel bearings that are made to higher standard so they run smoother and last longer for those who ride often in all conditions Tokens