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AIR-Quarius · 10-24-2011, 09:41 PM

Hi All, I was polishing this PM and looked down and noticed one tire was a little low looking...and then I asked myself, Darn you have forgotten the amount of air to inflate with...does anyone know the air pressure for tires under the Airstream?

**DKB_SATX** · 10-24-2011, 09:50 PM

It depends on whether you have load rating C or D (or E) tires. I run the max 50 PSI in my load-range C ST radials, which gets me enough capacity for any 3 tires to support the rated max gross weight of my Argosy.

Alumaholic · 10-24-2011, 10:33 PM

60 to 65 PSI in load range D tires.
It will be embossed into the sidewalls of your tires.

TRfour · 10-24-2011, 10:54 PM

The proper air pressure is stamped in the tire sidewall.
Here's a video that should help you out.
Michelin North America RV Videos and Demos Page

Good luck!

AIR-Quarius · 10-25-2011, 04:15 AM

Great! Thankyou much for the tips and advice. I bookmarked also the video to boot.
We have a scrap metal yard here in this town and will stop by there to see if they will weigh the Airstream. And furthermore I have a good friend who deals tires both new and used...A brand new set of tires for us would probably cast an arm and a leg, but thats better than actually loosing an arm and a leg in an accident.

dwightdi · 10-25-2011, 07:15 AM

Actually, the pressure rating marked on the side of the tire is the maximum pressure the tire is rated at. You can use this pressure to achieve the maximum load rating of the tire.

If you are not going for the maximum load, you do not need to use this much pressure. At these pressures, the ride will usually be pretty harsh. If you know how much load will actually be on each tire, you can go to the manufacturer's load chart to find out how much pressure you actually need.

Car manufacturers test their cars and find out how much pressure gives the best car performance. The recommended pressures are inside the front door on the side.

If you have the time, you could do the same for your rig. Lower pressures will give the Airstream a softer ride and save wear and tear on the rig. Too low pressures will overheat the tires and give you blow outs.

fltlevel510 · 10-25-2011, 07:26 AM

Here is a link to some very good tire information from Goodyear. Info is relevant to all tire brands. Covers weight distribution of RV and tire inflation.

http://www.goodyearrvtires.com/pdfs/tire-care-guide.pdf

TouringDan · 10-25-2011, 07:39 AM

Terry

Thanks for posting the Michlin video. There is some real good information here. I learned a lot.

Dan

TRfour · 10-26-2011, 03:37 AM

Over my long history of over the road adventures, I have enjoyed the best luck with aways keeping my tires inflated to the maximum sidewall load pressures. Better handling, better over all fuel and tire mileage as well.
I guess thats what has helped me and how come I got to become an antique~!

Many Happy Trails To You!

Alumaholic · 10-26-2011, 12:05 PM

Thanks for being the voice of reason (VOR) and advocate of the KISS principle. The videos and tables are nice, but on an ST load range D trailer tire the result is nearly always the same, 60 to 65 PSI cold if your Airstream is loaded for adventures on the open road.

It's so simple. You know the gross weight of your trailer. Divide it by four (if you have two axles). Look at the max load and the recommended pressure embossed on the sidewall. Voila, 60 to 65 PSI!

This dictum is not true for the folks that are running LT load range E tires, but that's another thread unto itself.