Made the switch in my triple axle XLR. I matched a new mounted 235/85/16 up to an old 235/80/16 and they are a full inch taller. Went to the local Goodyear truck center fully intent on buying Lt tires. ire guru talked me out of it due to the flex on the sidewalls. Mine seems to flex a lot, as 4 of the original 6 had belts break causing the tread to separate. Goodyear makes 2 different types of trailer tires, one for rv's and one for construction trailers. While I was there a landscaper came in for same size tire I was getting, and those are about 1 1/2 inches shorter. I got load range G Gladiators. They make 2 models in that size, a QR25 and a QR35. Was going to go with the shorter size but guy mounting explained that the sidewalls in construction trailer tires won't flex and will scuff the tread when you jack the trailer to park. I ended up with 1 inch between center axles and front and rear. You should have more clearance than that on only 2 axles. Had them on for 1000 miles so far and like them. Bit pricey at $185 a pop (6 at a time
). I had just switched the truck out the previous fall- 6 again
but Michelins. Gotta stop buying things with 6 wheels!!!