Male sure the tires are inflated to max pressure . Typically ST tires are not rated for speeds above 65 mph. Go under 65 . Make sure your wheel bearings are greased and the brakes are not sticking or hanging up. They will induce friction and thus heat
Heat kills grease, bearings and hubs . I have trailer box with small floor jack, 3 hubs with bearings, grease, rags, cotter pins, jack stand , and then I have tools from a 1/2 inch DeWalt impact wrench, to everything to change an entire huh out. I trailer thousands of miles a year and I have had my share of fixing stuff over the years.
Proper trailer maintenance and ditching the crummy Chinese tires and buying Good Year Endurance tires has been the ticket for me. Good luck.