Wheel Bearing and Race – On most rear wheel drive vehicles there is an inner and outer wheel bearing for both front wheels. The bearing fits inside the Race and its smooth surface allows the bearing to rotate freely. When replacing wheel bearings you should also replace the race. Wheel bearings like this one pictured should be re-packed with wheel bearing grease when performing a brake job, or if the wheels have been submerged in water. A wheel seal is installed on the outside of the bearing to keep the grease in the bearing area.