I agree with topheavy96. The only differerence I am aware of in the fender area between base models and the ZR2 is the ZR2 comes with the fender molding, 6 inch rims versus 5.5 inch rims, and 215 tires versus 205s. 235/75/15s should fit ZR2s with no significant problem I saw a 2-door ZR2 with 225/75/15s on it and there was plenty of clearance. I put 235/70/15s and a set of 235/75/15s on two regular Trackers (not ZR2s) before I lifted them and the only rub I had was on full lock-up turning. They are both now lifted and I still get some rubbing on full lock up. But I rarely turn that hard. Rarely. I'm sure I could pop a set of 30/9.50/15s on without too much more rubbing, I just want to step up to more differential gear before I do... and also get the full wear out of the tires I'm currently running first.