I got some mags CHEAP, 17" to put on my 1981 Ford F250. The turck currently has 16". What size tires can I put on the 17" rims without rubbing against the wheel well? I would go ask a shop but I don't want their pressure of buying their tires. I just need straight forward, no B.S. answer on what size can I put on? (And what does for instance, 285/75 mean? I found some of those, four for $260, used of course but in great shape).