Air Bag Suspention

Try the Truckspring site in the US or Firestone - or Poly Air - they all have comprehensive info available for download - PolyAir say 5 psi minimum at all times..... as I recall, 35psi max.

The blue Firestones run a bit different pressure to the polyairs ,, 10psi min and 60psi max unless you want to hear the "bang ".

I had Firestone's on my last vehicle (Hilux). From memory it was 10 PSI recommended min and 100 PSI max.

In practice, I think you can go lower than 10 PSI, providing you are not going off road. The risk is that with very low pressure, you might pinch the bags, but a fair bit of wheel articulation would be required t do that.

I have Boss airbags on my current vehicle. They don't seem to specify a minimum. Just a max of 100 PSI. I run them at 60 PSI under full load, and so far have let them down as low as 5PSI when not loaded.

Norm C

Gee I think 60 to 100psi is getting way to high, Big bang comes to mind.

I've got Firestone Coilrites (blue) and the pressures read 8psi min 35psi max

Regards
John

I have Firestone coil rites in my 100 series model (4124) and the instructions say for SUV'S 5psi minimum and 35psi maximum.

cheers Mal

I have boss air bag and pump system on my cruiser ute. The system came with a 140psi max switch even though the pump is rated to 200psi. In the advertising for the air bags they state they had tested them to 700psi without failure and stopped there. With no load I leave them with a minimum air in them to stop any possible pinching and to keep the seals tight. Fully loaded with my tray camper I will put 80 to 100 in them and then go off road - had no problems yet.