You should check your ride height and make sure it is just the fender and not a damaged suspension component.

 

I know what he's talking about, my car does the same thing. I just bent the little lip on the fender back further than it's supposed to be and all is fine. I think it's because my wheels are 17x7.5" rather than 17x7...

I've always run 205x40x17's, my bet is because of that extra 1/2" 215's are out of the question without some fender rolling or camber.

 

Im not sure how wide my rims are but I run 205/45/17s with no rub. Im lowering soon though so I will probably have to change that.