Part of the trouble of asking for tire sizes NOT brands is that tire manufactureres have a considerable amount of "free range" with the size that they brand on the sidewall. Want proof of this? go and comparer several different BRANDS of tires, but the same sizes, and keep track of your findings. I have seen as much as 2" difference in sizes among 235/75/15s, along with the normal disparity that you find in the bigger tires.