It seems trailer tire issues are incredibly common. In my experience, they just don't do well when loaded close to their max. I like to go up a size or up a load range. Once I get to 30% extra capacity, I haven't had issues. I routinely run 70 mph with no issues. Some trailers come with tires with extra capacity but most do not. My trailer came with the bare minimum in axles, springs, and tires. We go on long trips and are loaded pretty heavy, so I upgraded the axles and tires as well. Even before that I had LRD tires vs. LRC tires and even in all day trips through 100+ temps I never had a problem with the tires at 70 mph even with 65 mph rated Maxxis tires. My current tires are Goodyear Endurance with a higher speed rating, but I still feel better with the extra load capacity. They still run hotter than the rear tires on my Suburban.
