I have a 2005 Southwind 37c that had Goodyear G670 2.45/70 R 19.5 load range g. I replaced them with Michelins same size but load range h. They seem to ride much harsher with the same pressures 95 fro...
The tire pressure is determined by the WEIGHT on your tires, NOT THE LOAD RATING. The higher load rating allows you to carry more weight, but ONLY if your wheels and axle are also rated for the higher load, BUT it does not change the air pressure for a set load. In other words, to carry a load of 3000 pounds, the correct air pressure will be exactly the same whether you have F, G, or H rated tires.