I have a 2016 Aspect 27K with rear air springs...the original/previous owner did not put any air in them... i measured wheel well to ground on each side...it's recommended you keep pressures the same if possible...max air is 80 psi...I put 80 psi in passenger side but the driver side only needed 20 psi to level the coach...any thoughts would be appreciated.. we purchased our coach a month ago... this is our second MH.
On my former RV, 15,000 pound Class C had Firestone Ride-Rite air bags that could hold up to 100 pounds PSI.
I started with 85 PSI for both sides and it was a rough ride! I went do to 65 PSI when loaded with gear and fuel and no more than 80 PSI when lightly loaded (weekend trips). I had to keep both bags equally filled or the motorhome would sway.
I eventually upgraded my air management to a wireless Air Lift system. Maintain the pressure in the bags automatically.
Now I use Summo springs in the Sprinter unit - no more bags or compressors!
I added Boss airbags to my 16NJ and I am low 1/2 inch in the rt rear. I pump up my rt airbag to 35 psi, and the lt airbag to 30 psi. The 5 lb difference leveled it out nicely. It also lifted the MH about 1/4 inch off the overload spring which improved the ride dramatically.
Eighty five lbs is a lot of air and lift. I would try less.