http://www.rims-n-tires.com/info_spe...rw1=8.0&et1=10
hope that helps. u should be able to play around see what tire sizes will be "square" on your wheels. and for refrence, if u put your OEM sizes on the left side, and play with the sized on the right, the chart below will give u rough estimates with fitment with the wheel/tire sizes u choose. not perfect but comes in handy