Ditto on what LJAZ said. I'm still running the stock "junk" radial tires that everybody talks about; "Duro" radials
28,000 miles and still look new.
Keep them aired properly, don't overload and keep the speed down and you should be fine. Run them low on air, overloaded and at 70 mph and you can expect almost any radial trailer tire to self-destruct in short order and bias plies just as quick.