Well after being on here for well over 10 years I never thought I would buy a Carlisle trailer tire. I guess we'll see how they do. They are definitely a lot stiffer as I could immediately tell there was less bounce, but I did go from a 8 ply to 10 ply. It makes me wish I'd done it the day I bought the camper now.
I will say that once the old tires were in the bed of the truck I was really surprised at how soft they were, especially the sidewalls. Obviously not pressurized but comparing the two un-mounted there was a huge difference.