I know that when I am riding on my Swampers my street pressure is 22-25psi. Some may say that is low but it gives the best ride! When I firsted started driving with them they were set at 32psi!!! I could feel my filings come out at that pressure!

The swampers have thicker sidewalls so I can get away with the lower pressures safely.
Do you have stock shocks? Most everyone benefits from Bilstein shocks on and off-road!