Ok sorry I will clarify a bit. It asks you to pick TIRE sizes and comare them. Then gives you the info about the tire and the potential rim widths and such.
The issue I have with it is your comparing your tire and seeing what rim sizes work with it. Kinda backwards for my taste. I like to pick my rims that will work on my vehical and then find out what tire sizes work.

i do just the opposite!
i have been looking to enlarge the tire size on whatever rim i might get to fill the wheel well a little more without having to drop it.
