Air Ride suspension

It really depends on you and how heavy your rig is over the rear axle. Most systems have minimum pressures so you do not damage the air bags (if that is the type system you have) I am running about 35 psi in my system but have been experimenting with pressures. I have had as much as 45 psi, which made my rig ride rougher than we liked and then down to 30 psi. i am sure someone on here has a specific answer for you (never seems to fail. Many experts on here) Just do a little experimenting as long as you do not go lower than the minimums or over the maximums. I installed Air Lift on my RV with a minimum psi and a max. My mins are either 10 or 20psi and max is 100 psi. I never run the mins or max so that number isn't critical to me. If you know the manufacturer of your system, look them up on the web and get the operator manual for your specific system.