I have 17" 275/40 Toyo Proxes RA1 all around, on Cobra R wheels, 5.95" backspace. They work fine, no fitment or interference problems after 5,500 miles. I'm running SN-95 spindles and IRS. There are some pics at the site by my signature below if you'd like to see how it looks. Hope to have the body back from the paint shop early next week, if you'd like to see it not in primer! Good luck.