Token's 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. Token's X-Seal technology keeps bearing protected from dirt and water, with very little friction for a free-spinning bearing. Item Specifications: BB Shell Width (mm): 68, BB Shell Width (mm): 73, BB/Frame Interface: English, Bottom Bracket Shell I.D.: 34.7, Defined Color: Black, Spindle Interface Type: DUB, Weight: 105, keyword search: Token Threaded,