I bought four new tires which they wouldn't install after driving 45 miles for an appointment because Walmart's corporate policy requires they install only the exact size of tire stamped on the door. They do not allow optionaltire sizes that fit the wheel in common use for vehicles. In my case the new tires were P265 and provide a wider surface for ground contact than the P255 written in the door. They said I bought the wrong tire which is silly because it was correct size for the wheel. I suspect Walmart staffs 20 corporate lawyers whose job it is to find and avert potential legal issues but in reality they find problems where there are none and ruin the Walmart's customer service.