Problem with the Tire Center. When you buy Costco tires you are supposed to get free rotation and maintence for the life of the tires. Brought mine in for rotation and the work order said they would check the nitrogen levels, rebalance the tires, and rotate them After 20 minutes or so the called and said they couldn't rotate them because of "edge" wear. Went to pick up the vehicle and they had done NOTHING. "No work performed." Just gave me a cost for buying new tires. HA! My next set will be purchased at Discount Tire...