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Staun Tire Deflators

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Only: Starting at $75.17
Manufacturer: Staun
Manufacturer Part No: SCV

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What is a Staun Automatic Tire Deflator?

The Staun Automatic Tire Deflator is an inexpensive accessory used for airing down tires. The brass tire deflator screws onto any standard valve stem to automatically deflate the tire to a pressure of your choice. Adjusting the pressure setting for the deflator is as simple as turning the knurled pressure adjustment knob followed by tightening the lock nut.

Includes four adjustable deflators in a leather carry pouch.


Helpful hints for using your Staun Automatic Tire Deflators

1) Each 360 degree rotation of the pressure adjustment knob varies the pressure 6 PSI.
2) When the Tire Deflator has not been used for a long period of time, the deflator pop-off valve may stick to its seat. To ensure accurate operation of the deflator, pull the pop-off stem to unseat the valve prior to attaching the deflator to a valve stem.
3) Rather than setting all four deflators to a single pressure, set two at your rock crawling pressure and the other two at your sandy trail pressure. Mark each pair for their intended use. When airing down, attach the deflators to two tires. When the deflators stop bleeding air, move them to the second set of tires to be aired down.
4) When you have finished airing down, remove the Staun Automatic Tire Deflator from the valve stem... this will reduce the chance of snagging the valve stem and deflator on an obstacle.

Can't wait to start your trail ride? Simply attach the Staun Tire Deflators to your valves, hop in, and begin your trail ride. When the Staun Tire Deflators have done their job -- you're finished airing down; hop out and remove the deflators.


More Staun Automatic Tire Deflator Information

Thinking of purchasing a different brand of deflator? If so, be sure to read the Tire Deflator Comparisson article appearing below before you go shopping.

Tire Deflator Comparison

Automatic tire deflators are popping up all around the world. They vary in size and shape, and some look virtually identical to our Staunies. My objective was to see how they worked. And since I was not in on the design, I could not say what the other manufacturers' design objectives were, or if they were working properly, all I could do was report how they worked for me in the situations below. The videos present that information.

However, I can tell you what the Staun automatic tire deflator design objectives were. We wanted a valve that decisively turned on, decisively shut off, and did not leak after shut off. We wanted a deflator that was easy to adjust without tools, and was repeatable and reliable.

I first put all of the deflators on our standard trade show tire deflator demonstration fixture. I'd inflate the simulated tire to 30-something psi, screw a deflator on the standard valve stem just as I would a tire, observe and listen to how it started and shut off.

All deflators were adjusted to 15±2 psi. Some of the valves were hard to adjust because they did not have distinctive turn on or turn off qualities. Since I had a microphone near the valve stem, I also tried looking at the audio waveform to determine if I could see a distinct change in waveform amplitude. On some, this helped and on others it was of no help.

View air test video

View water test video

Using water idea is not new. When I first evaluated the Staunies for my newsletter in 2001, before I went to work for Staun, I did the same thing. And for the skeptical, I have personally had the occasion to lower my tire pressure in a stream after finding the stream bed traction gave out, so using the deflators underwater is not that far fetched.

by Harry Lewellyn


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