I run 235/75/15 Michlien LT (load range C) tires on my travel trailer. They are rated at 1950 per tire at 50 lbs air pressure.
If you have stronger wheels, getthe 235/75/15 load range D tires and run them up to 65. I don't know the maximum load, but I think it is about 2500 lbs. You want to be about 15% over the gross weight rating with the LT tires.
My tires do not scrub or wear. They have over 30,000 miles on them and they do not leak air and look perfect. The beads, etc. are as strong as theST tires so there is no problem there. They went up the Alaska highway and back .

I recently bought an older trailer with a higher weight rating. I had to get the tires changed to move it off the lot and I do not plan to pull it much. Thought I would get the trailer tires because they are compunded to handle sitting still better, supposedly. I wimped out and just bought the Goodyear Marathon Load Range D trailer tires that was reccomended by the manufacturer and the tire guy and he came and put them on at the site and greased the bearings . Sweet deal that saved me a lot of trouble???

Guess what?? Big mistake. 486 miles and 2 weeks later the trailer is sitting in my driveway with one tire down to 9.5 lbs. These ST tires are just plain crap, and I am embarresed that I got burned on them when I actually know better.

 

I am done with ST tires also. I have had poor performance from them over the years. Besides them just falling apart, I had one blow up on my flatbed, while parked, empty, at a DTR meet. I was in the staging lanes and RattlinRam was in the pits. He called me to tell me one of my trailer tires blew up. Fortunately they were grilling at the back of the trailer at the time.
Since then I have been running LT tires and have not had any problems.

If you go with the LT tires in on your TT, you should not have to get the taller size. You will probably be just fine with the factory size, as long as you can get the proper load rating for your GVW.

Chris

 

The Michelin Ribs on a 2500 or 3500 will run 95,000 miles. Look at the build date on your tires. If they are older than 5 years old, your looking for problems. (DOT #--------) For you the BFG in the LT may be good since you don't run the trailer that much. They are also smaller than a Michelin of the same size. I run the Load Range E chinese built 16" Marathons on my fiver. Been on there since 2008, have about 13000 miles on them. So far So good.
I paid 143.00 each for them. More now I'm sure.

 

Check out Denman tires, they are suppose to be good. You can even get 15" Bias, which may work, although their radials are rated for more weight.
ST tires, if built properly (big IF!!) endure sitting around and scubbing when jacknifing into a spot. If you travel a lot LT's, particularly the BFG Commercials should work fine. Going with 16" steel wheels would be good , if the rubber will fit.

 

Check the bearings and get axles aligned. Then see if u can get firestone transforce AT in a 15. Other wise get 16 inch rims and run a 215-85-16 firestone transforce AT. We use them on every trailer. From car trailrs to 40 ft tandem dual goosenecks and have had 0 problems with tires.
Plus they are only abot $130 each.

 

Denman tires are the usual Chinese crap. I lost 4 tires in a 963 mile trip. I have since installed 4 Michelin LTX tires.