the car that both jamey and nate(trog ) are talking about is joe's celica. He has 17x8 rims with a 35 mm offset. You can fit up to a 235/45/17 tire on a 8 inch wide rim wiht absolutely no probs. the reason he scraped was a combination of a panic stop and a pothole. under normal driving and racing it will not be a issue.
I understand now. The combination of 35 mm offset and 17X8 rim puts his tire close to the fender. Does not give him much room for error.
In my case with 40mm offset and a 17X7 rim I should never have any scraping problems.
Thanks for clearing the issue. I was all concerned.