Good info,,,thank you all....As usual it seems some people have sway and some don't...
And yeah Superstroked,,,a lot less sway with a 5er than a bumper pull.,,which is what I have...But ,,I do have an excellent Blue Ox ,weight distributing/Anti sway hitch. Are those 80psi or 65 psi tires ?

Gots to do some more research

 

They are 65psi. I make sure and check them before every trip. I think load range E tires are 85 psi but I'm not sure. That's is what I will replace these with when the time comes.These tires were put on by the previous owner.

 

Letter from Toyo when I went to 35s.

 

Great post. I had been wandering the same in regards to running the 35's and towing fifthwheel. Thanks for the feedback aswell.