If you run a 18 inch rim with the same offset as the factory you will rub. Go with a bigger offset and you will be fine. The clearance on the rear strut tower wont let you go any wider on the rim on the factory offset. I used a enkie rs5 18 on 15/40-18 and they come further out then than the factory ones, because they are a different offset. I have plenty of clearance now and when it comes time to replace the tires i am going with 225/40-18. The car also has a 2 inch droop, no rubbing at all.
