I will be buying a new set of tires for my van, Costco has a good deal on a set of all terrain tires. My question is do they run any louder or rougher than normal LT tires ?
All depends on the tire brand & the vehicle. I run Hankook ATm LT LR-E tires on both our vehicles and they are a bit louder on the truck, but not noticeable on the Jeep. They will be squirrely the first 800-1000 miles, but then will settle down and you will not notice any difference in ride from your old tires.