I don't know how many posts I have read on lowering air pressure in larger tires but it's been a bunch. FINALLY lowered mine(33") to 27psi from 31-32psi. Wow what a big improvement! I am now looking at replacing my Pro-Crap shocks with the RS5000X for 4" lift. Can the rear shocks be mounted upside down? I will probably take the boot off and have more clearance next to the lower spring perch.