Rear Wheel Bearing Kit. Wheel bearings typically fail from water and dirt contamination. The All Balls Rear Wheel Bearing Kit was developed in partnership with KML Bearing and is designed for the difficult operating environment of the powersport industry. Kit contains ball bearings and seals - all that is required to re-fit a single wheel. Premium EMQ quality, high-speed bearing featuring low drag, double-lip rubber seals which provide superior exclusion of water, dirt and improved grease retention. Type TC Nitrile Elastomer wheel seals are specifically designed to keep out water and dirt. Rubber-coated outside diameter creates an optimum seal at hub. Steel garter spring guarantees constant pressure on the axle shaft over the life of the seal. Bearings utilize Chevron SR1-2 grease which contains high-performance rust and oxidation inhibitors (-29°C to 177°C).