Discount Tire for the past 25 years. Initially, it was because they were conveniently located. Then it was because they had a large network of shops and an excellent road hazard warranty. They've always treated me better than I expected. So... here's the rest of the most recent story.
When we got all situated at our boondock site between Heber and Show Low and were getting ready to go out for a drive, BJ noted a nail in my right front tire.
Then he said, "The sidewalls have a lot of ozone checking." Yup, that's true. The truck has been outside the whole of this set of tire's life. According to him, ozone checking is covered under the road hazard warranty. Who'da thunk?
BTW, did you know that nearly all towable RV manufacturers don't balance the tires they put on their trailers? Apparently since people don't ride in the trailer they don't care. Seems crazy to me!
I don't have any connection to Discount other than as a very happy customer! They've got my business!