heavier trailer tires and fuel economy

JIMNLIN wrote:
It matters with tires on a trailer also and can be even more so depending on how much pressure is used in the heavier duty tire.
Some rv folks tend to over tire their trailer like this rv trailer owner found out.

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When it came time for me to replace our tires, I researched many different ways to go. I wound up purchasing 17.5" J rated medium duty truck tires and wheels. When all done and said, it was $5.00 per wheel and tire combo more than just replaceing the 16" tires. This tire and wheel combo is good for 6005 pounds each. Using the inflation chart to get the pressure for the load, I inflated to 80 psi which was good for 4500 pounds per tire. With the first tow with these tires to Kansas City, I have made this trip to the speedway several times before, I was down almost 2 mpg both ways. The tires were 20*-25* hotter than the truck, which I have never experienced before. I inflated them to the side wall pressure, 125 psi for max load, before our trip to Florida. Now the tires run 5*-10* cooler than the truck and my fuel mileage is back where it used to be. I have always run max pressure up until I installed these tires, with what I have experienced, I will continue to run what the side wall indicates.***

One poster mentioned LT tires for a 10000 lb trailer. Its been my experience best idea for trailers with 5.2k and 6k axles/16" wheels and 16" LT tires recommended by the tire mfg for trailer use.