FAQ.. it might help
I know if you do a bit of searching you can find what you want. But just suggesting some simple FAQ's about tire sizes could help.
I finally discovered that 4.5 inch backspacing is as far as you can go stock as well as limiting it to 8 inch wide wheels without rolling the lip or similar tactics.
Mght help people more quickly figure out their wheel questions as that seems to be the biggest one.