Replaced LTX with Defenders. They vibrate horribly at any speed or road over 60 MPH. Rebalanced multiple times, essentially no change. Tire store replaced tire they said was bad, minimal change. I had the front bearings replaced, the tie rod ends, and anything else that could cause the vibration (which I did not have before). Still no change, the tire store wants to switch the truck to Coopers, no charge. I have Michelin's on all my other vehicles(Acura MDX, 4Runner), no problems. I see other customers with the same problems. What gives. The Coopers are on order.