06-09 YAMAHA YFZ450: ALL BALLS REAR WHEEL BEARING KIT All Balls wheel bearing and seal kits contain all of the bearings and seals needed to rebuild one wheel. Premium EMQ quality, high-speed bearings feature low-draw, double-lip seals that provide superior exclusion of moisture and dirt, improving 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 the hub; steel garter spring guarantees constant pressure on the axle shaft. Sold as a kit