Good Sam Club Open Roads Forum: Fifth-Wheels: Air Pressure for airlift airbags
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 > Air Pressure for airlift airbags

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goducks10

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Posted: 07/10/18 08:19am Link  |  Quote  |  Print  |  Notify Moderator

An 8500 lb 5er would have a pin of about 1700 lbs. Thats not much at all even for a 3/4 ton. I use bags with a pin of about 1800-1900 lbs in my Ram 2500 and only put 25 psi in them. That gives me a little more side to side stability. Anymore and the rear of the trucks to high. with 25 psi the trucks sitting down about 2" in the rear which puts it 1" higher than the front and leaves the 5er about 1/2" high in the front.
I've tried 20, 25 and 30 psi. 25 is the best for ride and overall setup.
50 psi would be way over the top for me. Just wondering why you have bags and why you need 50 psi? Are you hauling a lot in the truck bed?

Cummins12V98

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Posted: 07/10/18 09:43am Link  |  Quote  |  Print  |  Notify Moderator

You really did not need bags for such a light RV. BUT they can improve ride by starting out with 5psi unloaded then hitch up and check the pressure, it will have increased. Bottom line add just enough air to bring truck back to "LEVEL" and do NOT think you need to make the truck set the same height as without the RV. You want the bags to be there for support and control axle bouncing. If you have not done so throw on a set of Bilstein 4600's.

I am betting with 45psi UNLOADED adding the RV makes for a very rough ride!

Air your tires based on LOAD.


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"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

mick2268

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Posted: 07/10/18 05:21pm Link  |  Quote  |  Print  |  Notify Moderator

Used bags back when I had a huge Lance truck camper. first off you want them rigged to separate air valves, not just one with a T. If you have just one, they tend to making cornering worse as one bag will force air into the other side, making it more dangerous. I always liked the air valves somewhere near the fender well for the following reason.

With the camper on, I would add air until the sag went out of the springs, then lower just a bit to set some weight back on the springs. this will give you a full suspension, and the most stable ride. Quit worrying about getting the truck level, it doesn't always result in the best and safest ride.

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