Wow that is a new one for me. Kurt years ago we used to run van trips thru the southwest with teenage kids. We had two 15 passenger Dodge Ram vans, and two custom made trailers that we towed behind them. Every year at least one or two trailer tires would go on the trip(7500 miles over 7 1/2 weeks). My last years working for the company we put all new tires on both trailers, and had them aligned. not a 1000 miles into the trip we were already replacing one. I have no idea why trailer tires wear out so fast compared to car tires. Every morning we would start out slow to warm the tires up, because they would get flat spots when we parked being warm from driving long distances. The slow starts keeping it under 45 for 10 minutes or so seemed to realy help. Never had one explode on the spare rack!