The max tire pressure for the standard tires on the POD is 50 pounds if you are carring the max weight. If you know about what the total weight that you are at with your trailer you can use that to figure out what the right tire pressure is. For the weight of our trailer and gear I run 44 pounds in the tires. As you travel the heat of the day,weight in the trailer, speed that you travel, road surface and the air pressure in the tires all contributes to raising the pressure in the tires. I have found that traveling at 65 MPH on a sunny 97 degree day will raise the trailers tire pressure by 7 pounds.
On a side note, if you have a tire that is loosing air pressure on a regular basis get it repaired before your next trip. A tire that is run on low air pressure will flex the side wall more causing more heat and could lead to a massive failure ie.blow out. The only proper repair that should be done is to have the tire broke down off of the rim and have a patch put on the inside, this way the tire can be inspected on the inside to make sure that there is not anyother problems with it at that time. This should apply to the TV and the trailer.
The other tire repair is a plug that is done from the outside of the tire and should only be used as a last resort to get you down the road to a place that can break down the tire to patch it.
Be safe, hopes this helps. Goose