Got a question. I was checking craigs list today and ran across these pony rims. I call the guy and he said there 15's? he aslo said they have 225/50/tires on them. He said they were off a 94 mustang not sure if it was a v6 or a v8. I want to get some MT slicks to swap out for the track. Whats the biggest slick I could put on these rims? http://desmoines.craigslist.org/pts/1700540856.html