ACDelco GM Original Equipment Wheel Bearings, which allow the wheel to rotate with minimal friction, contain tapered roller, straight roller, or ball-bearing elements depending on vehicle-specific application. Wheel bearings support the weight of the vehicle and are lubricated with axle oil or wheel bearing grease. These original equipment wheel bearings have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.