Turning the Airstream, and I do a lot of tight turns in my driveway and campsites, does wear the front and rear tires differently - I've observed the 'skid' tracks on my driveway with the front tires seeming to lose more rubber. The periodic rotation goes with the rebalancing, which I think is good preventative maintenance. It's also the best opportunity for the tire guy to give them a good inspection, although I visually check them frequently. 50 psi is the recommended inflation on the 14" GYMs. Under-inflation is a primary cause of tire failure.
Joe & Joan Donnaway