All of our bottom bracket offerings will use an appropriate Conversion Kit specific to the brand and model of crankset to be used. Our Conversion Kits are made to account for crank manufacturers' machining tolerances and ensure they mate perfectly with our precision bearings, extending product life, and reduce the potential for noise. They consist of two spindle sleeves and a varying amount of spacers, and adapters. This page had individual spindle sleeves in case one has been damaged or lost. These are not complete conversion kits.