My tire wear was outside edge of right front and wear on inside eddge of left front with a slight vibration mostly felt at 52-55 mph. Had front end aligned and tires rotated...still had the problem. I then had an alignment of all locations, front , duals, tag and it was found that right rear duals were out about 3/8 inch causing the coach to push and wear as noted. I did not have tires rotated, but keeping an eye on the tires I think the problem is resolved. Newmar does the final alignment after construction according to Spartan.
2008 Jeep Sahara '4Dr"