Thanks. Kind of how I was leaning.

 

I currently have Goodyear Marathons ST235/80R16 Load range D, 65 psi, 3000lb tires.
Have been thinking about upgrading to Maxxis M8008's or maybe this new Goodyear Endurance tires but in load range E, 3600 lb, 80 psi tires.
I read that the 6 lug nut wheels are rated for 80 psi, and 8 lug wheels are rated for 120 psi. So my wheels should be OK.
I like the thought of a higher load rated tire, I'm just concerned that by airing up from 65 psi to 80 the trailer will be hard jarring ride.

 

I doubt there would be much of a difference to your dishes.

 

It would best to check your wheels for their rated pressures, the rule of thumb you gave is not iron clad, there are some higher rated 6 lug wheels for example. And many of the 8 lug wheels have a 110 PSI rating. There should be sticker on the back of the wheel or some will have it stamped into the rim.

 

When we bought our 2011 Jayco Pinnacle FW in 2013, it had Marathons on it. Although the tire had less than 300 miles on them, I replaced them with the Maxxis M8008's. These are great trailer tires even though they are manufactured in Thailand; Apparently better quality control in Thailand than in China. We experienced first hand the damage a China bomb can do to a trailer. Don't want to go through that again!

 

I towed my new T.H. home from the dealership (375 miles), and promptly took it to Discount Tire and had the Trailer King tires removed and replaced with 4 Maxxis M8008 tires. They are the third set of 8008 tires that I've owned and unless somebody comes up with a better tire ( too early to tell on the Goodyears), the Maxxis will be bought again when it's time. When you find something that works, stick with it!!

 

For what it is worth.

Maxxis also has a D/E tire that may fit depending on the size. I use a 225/15 on my trailer at 60 psi it is a D rated tire. at 80 psi it becomes an E rated tire. I run mine at 70 psi which is within the ratings of my rims. I have used Maxxis for the last 7 years on four different trailers and have had no failures.