I just bought a 1971 Cortez and I thought I was lucky that it has 12x 16.5 wheels and tires. When My new tires arrived, the rear tires were too large diameter for the rig. They rub on the rear swing arm bushing. I would like to hear what others may have done. The old ones are about 31 inches, the new are 33 on the edge , and 35 in the middle. No way will they fit.Any suggestions for me. IU will buy new wheels and tires, no problem. Gary 414-578-6170 I am in Phoenix, but need to return to Wi on wednesday.The Rv will be based in Phoenix.