Hey AdamR, Specs: 255-60-r15 (15 x7 4.5 BS ) Dont quote me on this but I think they are just about the biggest tire you can squeeze in thier with stock spring location and wheel wells ( I heard people say they have 15 x 8's).
All you need to do is trim the lip a liitle and you cant tell unless you look from under. some pics.
Hey AdamR, I have a correction on the specs of the rims. The BS is 4 inch not 4 and a half also my Dad says the same tire with the 4 1/2 inch BS would be perfect. We tried to get them but that BS isnt available with our style of rims. Take care.