Tire load range

Have traveled over 34,000 miles over the past 9+ years on 2 sets of so called "China bomb" tires without issue, the first set was 7 years old when replaced (I did not note the fact they were already 2 years old when purchased new back in January 2011) and the current set will be 5 years old in November; they are Hartland tires (China built) from Tire Factory.  Both have been the "C" tire and always travel (at least when we start) with a full FW tank when leaving.  Thinking we will graduate to the Carlisle "D" when they are replaced next spring.  I do note that the current tires flex a fair amount when traveling over rough, gravel or back unpaved roads but have never had any incident.  Keeping the psi in the max range of 50 psi has been a substantial reason why I feel we have been so fortunate.

I have an 07 Ram 1500 and 179.  I had the factory C tires for 5 seasons.  I went with E rated tires because I like the extra safety margin.  And my mechanic friend uses them on his.  I don't notice any extra bounce in the mirrors or with the stuff inside the trailer.  But I do notice the loss of that little bit of almost imperceptible side to side movement, and the side wall squish that I used to see in the mirrors with road irregularities.  And the tire pressure is higher.  Take your pick.  Either is better, I think.

I have about 10,000 miles on the original tires on my 2020 R-pod 190.  They are still in good shape, but I am getting ready for another long trip so I decided to replace them.  I am either going with Carlisle or GY Endurance and I am not concerned about which one to chose, but I cannot figure out if I should stick with Load Range D or bump up to E.  I rarely drive over 65 mph so speed rating is not important.  My concern with going with E is that the pod will start bouncing around more than it already is.  Or should I go with E for the extra weight capacity but keep the psi lower to reduce bouncing?