I guess I disagree here. 235 70 16 will definitely rub on my 1999 GV without any lift, and depending on the brand and exact size, might rub badly. I ran that size for two years, and it's a pretty close call even with suspension lift. It also depends on whether it's a Tracker, Vitara, or Grand Vitara, as they all have slight differences in wheel well room. I think I used to run a 225 70 16 before I got my lifts (body and susp.) and it looked good and didn't rub. Can't remember for sure, but I'm pretty positive. Good luck.
Dave