On the 4x2, the rotor, hub and bearing are all one piece. They can be turned, but have to be doen on the truck. A dealer should have equipment to do this. However, I have never turned one, just replace the entire unit, as the bearing has failed before needing turning. There is a company that makes a replacement hub, Centric. You then use the 4x4 rotors. Use the Search and enter Centric and you should find some posts about them.