Eddie,
Not sure what tires are on your rig. Sailuns can be run at 80 PSI but provide a lower weight rating at 80 PSI. You would need to determine how much weight you had on that tire and compare to the Sailun weight chart assuming you were running Sailun.
Obviously better to pump tires up if you carry a compressor.
The Sailun chart can be downloaded here.
https://www.montanaowners.com/forums...?do=file&id=15