That's going to depend entirely on what wheels you're using, specifically their widths, offsets, and backspacing as well as what suspension modifications you may be making in the future. In general, we usually recommend a 33x11.50" tire or close metric equivalent in order to avoid rubbing issues with most wheel options. You can get away with both slightly taller and slightly wider tires depending on your wheels and plans. Your best bet would be to call us directly at 623-434-5277 so we can get more specific with what you're doing.