I know for sure this has been asked and answered hundreds of times, but have you ever searched "tires" or various derivations in the fifth wheel forum? Either no matches or 244 pages! To the point...I...
My camper came with LT's, load range E. 245R70 16's. They rot out before they wear out. I replace them at 5 years, regardless of tread condition. Give the pull offs to my farmer son-in-law for use on farm pickups. Cheap insurance.