This isn’t to stir the pot, but something to think about. My fifth wheel has a GVW about 500 less than yours. The weight on the two trailer axles is about 10,650 when hooked to the truck. Last summer was the time when I had marked to get ride of the Marathons that had about 5000 miles and from the factory. I just didn’t like the LT options which would give me about 1300# of a cushion when adding up the tire max Times 4. I can understand why a tire dealer would be concerned even with the track record Michelin XPS Ribs have.
