I have a 2000 31' Maverick class C Ford E-450 (still under warranty) with strange tire wear that I cannot find described at any tire web site. Nor can it be explained by several tire dealers that I have visited. The "lugs" which I understand are the approx 1" "cubes" of surface, show random wear over the surface of the two front tires. One "lug" is worn but those adjacent to it are not. About 25-30% of the "lugs" are worn randomly around the circumfrance. It affects only the front tires with the passenger side affected more severly. The rear duals are fine. There is no driving vibration, pull or bounce. I have 13,500 miles on these original tires and they were balanced & aligned @ 6m miles. Tire dealers have said the wear "might be" caused by (take your pick) front end bounce (weak shocks? weak springs?) ball joints, too much weight in the front end. Tires are original equipment Firestone steeltex radial R4S LT225/75R16. Anyone have the same experience?