Designed to be used with X-Type or EXI cranksets. Manufactured from high strength aluminum & featuring custom retainer bearings. Race Face BB cups are also compatible with various Shimano and FSA external BB systems, making for a great upgrade.FeaturesBB Cups are forged & CNC machined from 6066 aluminum.,Tapering wall construction to minimize weight.,Custom 6805 16 ball retainer bearing,Bearings feature our custom triple wiper seal to better retain grease & keep contaminants out.,Bearings are factory filled with Phil Wood waterproof grease ÔÇö tested & proven to extend bearing life.,Interchangeable with select Shimano and FSA external MOUNTAIN BB systems.,Fully serviceable with BBEXITOOL.SpecificationBuilt for: XC/AM,Weight: 95 grams (68/73mm),Colours: Shiny Silver/Silver Decal,Compatibility: 68/73mm, 100mm.