All of the Chris King bottom bracket offerings use an appropriate Conversion Kit specific to the brand and model of crankset to be used. Conversion Kits are made to account for crank manufacturers' machining tolerances and ensure they mate perfectly with Chris King precision bearings, extending product life, and reducing the potential for noise. Fit Kit #6 for SRAM GXP Cranks: For use with ThreadFit 24, ThreadFit T47 24i, ThreadFit T47 24x 68mm, 73mm, 73mm SB+, 86.5mm, 92mm, and 92mm SB+ BB shells Common cranks: SRAM GXP