A 4x4 wheel bearing kit is a complete replacement package that contains everything you need to replace your vehicle's wheel bearings. It typically includes new hub bearings and races, seals, snap rings, lug nuts and other components necessary for the installation. A 4x4 wheel bearings replacement kit is essential for extending the life of your car or truck’s suspension system and prevents excessive wear on your tires. Proper maintenance of your wheel bearing kit ensures a smoother ride with better handling response.