This unique bearing kit eliminates the external headset bearing cup and provides a simple low profile solution where the bearing itself presses directly into the head tube. The kit includes fork crown race, upper split-ring and cap.Bearings feature anti-corrosion Black Oxide/Magnetite treated 52100 High-Carbon Chromium alloy races paired with large grade 10 BallsDual-lip labyrinth (LLB) seals ride in a micro-groove for ultimate protection against sweat and the elementsContain the 90% fill Mobil XHP 222 high pressure water proof synthetic grease, so you never have to guess if there is grease insideBlack Oxide treatment provides an extra level of corrosion resistance and extended worry-free performanceEnduro Angular contact bearings are designed so that the balls are engaged to spread the force over a larger surface area for minimizing wearItem SpecificationsBearing TypeACBColorBlackCrown Race30Defined ColorBlackS.H.I.S LowerEC34S.H.I.S UpperEC34S.H.I.S. Stem Clamp Diameter28.6 Threadless Enduro External Bearing Kit Headsets UPC: 811780027558