2003 Focus SVT - stock suspension: The previous owner put on a pair of 225/245/17s on the rear of the car before I bought it. Stock size is 215/45/17, which is what was on the front of the car. Since I wanted matching tires I purchased two more 225/45/17s. Now when I hit decent sized bumps the front tires rub. I think they are hitting the plastic inner fender well. Of course I am pissed beause 1) I would not have purchased 225s on my own, I would have stuck with the 215s and 2) I bet the PO had 225s on the front but he put 215s back on the car and did not tell me. There are no rubbing problems turning the wheel lock to lock.
I don't want to buy four new 215s, so is there anything I can do to address the issue? Any suggestion on how I can determe where the tires are rubbing? What am I risking by having the tires rub? Between the hill crests and potholes in my city this could get really annoying.

