Just about everywhere you go to shop for tires, there is some kind of table that tells you if you have this size wheel, buy this tire. No where do I see them take into account the width of the wheel. I have seen 15 X 5.5 wheels as well as 15X7. Does not the wheel width matter when selecting the size of tire? For example, I currently have 15X6.5 wheels. Prior to that, I had 15X5.5 off of a mini cooper. Both called for a 195/50/15. The 6.5 feels planted a lot better to the ground.