well heres the deal, im GUESSING the thinnest tire you could possibly put on there is a 10.5, which means you might be able to get some 31x10.5s on there without any lift. however, it would be better to get bigger tires than that, and then you would have to do some kind of lift. there is a guy on here that 44x15 tires on his 15x10 rims, now that is sweet, but he has 19 inches of lift installed