Les Schwab
A friend bought some of their tires and had reasonably good luck until he went on vacation. While on vacation, he had one of the tires fail, and of course, he happened to be in a state that had no Les Schwab stores. He had to replace it on his own, since he couldn't find anyone who would stand behind their warranty. When he returned home, he attempted to get one of the Les Schwab stroes to stand behind the failure. They were wiling to replace the tire, however they would not give him a refund for the tire he had to purchase. He really didn't need another tire, so... ... .
Guess that if you don't leave the states that have Les Schwab stores, you will be okay. If you travel to states that don't have their stores, and have a problem, it will be YOUR problem :-(
Frank Dz