I bought an older 15' (measured from bumper to hitch) Serro Scotty Sportsman travel trailer with no title. The person I bought it from claims it's a 1971, but I can't find any proof that SS made a 15' Sportsman in 1971. It also has 14" wheels, and that doesn't seem standard either. My dilemma is I need new wheels and tires and I am having a hard time finding the right ones. Should I be putting 15" wheels on or did SS make a TT with 14" wheels? Any information would be greatly appreciated. Thanks.