I finally got around to having my coach weighed on my current trip, recording the weight of the front and rear axle as well as the dinghy. I was glad to see that I was not overloaded per the placard. Then I went online to the Toyo website and downloaded their info on inflation of tires by size and was surprised to not find my tire size on this chart. Perhaps I am looking at the wrong chart. My tire size is 245/75R22.5. There is no "P" in the front of the size number, so I take it that this is a n ISO size standard. It's also labeled as an M154 and load range 6. Could somebody point me to the right chart to tell me how to best inflate my tires?