Part number: 102206 Inner diameter: 30mm Outside diameter: 62mm The height: 16mm Weight:0.226kg Wheel hub bearings are key components for automobile, which are applied to chassis system. The main function is to support the weight and guide the rotation of wheel hub. They allow each wheel to spin freely and at the desired speed. Wheel bearings take a steady amount of abuse. They support the entire weight of your vehicle while traveling over rough roads, potholes and other rugged terrain. Wheel bearings are one of the longest lasting steering and suspension parts, but it really depends on driving habits, driving conditions and other factors.