I've played with the pressure on mine and 75# is about right for out load. Then after adding 300#s of Solar batteries to the front storage I had to adjust the pressure. So you'll need to play with the pressure and check it every few times before going out on a trip. The pressure changes with altitude, weight, outside air temp. You really don't have to use a gauge though just air it up til it just raises to the top of the arrow and stop. If to much air in it then it won't articulate up and down so it won't absorb the shock so to much is bad just like no air in it is bad. When you hit a bump it should flex and absorb the shock of the bump. You can watch it from your rear view mirror. We have the Trailaire pen box along with the Trailaire axles and it is a very smooth ride.
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000