Hey I personally would recomend a 17 inch wheel i have three set's of wheel's for my svt my fist prob was stock wheels didn't like to much than I went to 18 inch with 225/35/18 and I warped all the wheel and now I have about 3 grand of garbage now I just got a new set of 17 with 215/45/17 and for me that seem's to work the best and they still drive nice.
98.5 svt contour