If it is a 3500 lb axle, can upgrade the 5 on 4.5 hubs to new 5 on 5 hubs. If you are running factory aluminum Jeep wheels, will have to run spacers because the center holes are too small for fitting over the axle hub.Have an IntechRV Explore with Dexter axles, and I eventually want to put matching Jeep wheels/tires on it. What are my options? Id rather stray away from spacers/adapters.