For anyone thinking about upgrading, it looks like Simple Tire has Sailuns on sale today for 10% off. I have no affiliation with Simple Tire or Sailun.
marathon that came with the trailer. never no may have run over something. I seen it start to smoke and pulled over just before it blew apart. I always check the tires when I pull over so I think I may have had a flat for a bit then notice the smoke. No damaged but changed brand anyway .Went to 110 psi tire