Just for comparison Example of pressure increase on the road... But keep in mind this was my single axle hybrid trailer the first season after I bought it used...
with factory spec 175/80/13 Load C rated and running at 50psi, temperatures after a two hour highway run never exceeding 65 mph... Pressure reached 62-64 psi when I checked immediately after stopping.
That's about 25% increase, which seemed high to me, and lead me to stop at a scale on our way home. It turns out each tire was approximately 15% over loaded.
Please double check your weights, weight distribution and pressures... Something just doesn't seem right there.
