If your trailer is new, or you don't know service history, if used, you need to check the bearings for proper grease. Many new trailers come with minimal grease, so don't count on the manufacturer doing a good job.
Most ST trailer tires are only speed rated to 65 mph, so don't tow them at 75-80 mph for 8 hours, as they will likely fail. Heat is the tires enemy, from excessive speed, or under inflation.
Some new generation ST tires are nylon wrapped, and have a higher speed rating of 81 mph, due to cooler running, from better design. A few, Carlisle HD, Provider, GY Endurance.
Enjoy your new trailer!
Jerry