Many brands of 5th wheels were built with LT tires and did well. My NUWA is an example. The axle rating matched the tires which were Uniroyals when the trailer was built in '04. I changed them in '12 with Michelin LTXs. All of them have done well without issues except for 1 Michelin that was replaced due to a puncture that could not be repaired. My axle weights are under the max rating. We travel 5-8000 miles a year. As long as the tire meets or exceeds the axle rating there are many good LT tires that will work at a reasonable cost, IMO.