I bought a set of tires for my F150, I paid right at $1000.00 for them installed. Three tires started leaking air within a month, I had to install fixaflat in them to get them to stay inflated. The tires were half worn out by the first year. I rotated them several times that year. I was told by the clerk that the roads in Texas are made of "flint" and that is why they were out so fast. I have barely got 30,000 miles on them and it is only two years of highway driving and they are worn below no w the wear marks. the store claims they wont honor the warranty as I rotated the tires myself, and did not bring them in to have it done. At no time was I ever informed that I had to bring them in or lose the warranty.