They are 8.5". A 275 will fit, but you're pushing it. The tire would have that "sucked in" look. It will be even worse the lower the tire profile gets as you will lose sidewall height. I have a 255/45 on an 8.5" and it looks perfect IMO. I wouldn't put that combo up front though. It is better suited for a 9-9.5" wheel. Plus it will adversly affect your cars handling up front(stock setup).