They are heavier than a standard consumer grade trailer but certainly not close to your hitch limit. I used them for years with no issue. As Rick said, just check the tires, before you leave Uhaul and during your drive. You can check the temperature with your hand when you stop for fuel.
Glenn & Mary
2000 Monaco Dynasty 34 York
Three Toads - 1997 Jeep TJ :: built for dirt / 2015 Jeep Grand Cherokee Diesel :: built for comfort in the dirt / 1990 Miata :: built for fun