Fits a Sram GXP road crank to a 68mm wide BB Shell or a Sram GXP MTB crank to a 73mm wide BB Shell. Extremely reliable and efficient bottom brackets with coated ceramic bearings, tight variances and industry-leading durability Reduced friction and better protection from nature`s elements Long lasting durability and extreme performance 68/73mm BB30 Sram GXP 24/22mm Black