Andy, I have put "Trailer Radial" tires with a pressure of 50 psi on my 1976 4 wheel Airstream and it tows better and there seems to be no signs of wheel failure. Should I expect a problem? Yours Truly, - Karl F. Larsen, k5di@arrl.net (505) 524-3303 - http://www.zianet.com/k5di/