I appreciate all the responses. I'm still not sure if I got the exact answer I was looking for although everyone has been very helpful.
I've read through a few threads, faqs and forums, but I wasn't able to find the exact answer I'm looking for. I don't plan on lowering my car anytime soon. I want to know that if I put the right size 18 inch wheels on my car with the right size tires, will I run into problems or will it be a direct fit...no adjustments. If I have to roll my fender or anything else, I'd rather put 17's on because I know I can find a set that are a direct fit.