SpurtarTire Deflator, 6-30 PSI Air Down Tire Deflators Offroad Accessories for Jeep, Car, Truck, Motorcycle, and ATV (4 Pack with Storage Bag)

They work well and are adjustable. They take time to adjust to desired pressure, but once set it is super convenient. They take almost 15 minutes to deflate from 39 psi to 17 psi.

We need to air down six tires on an RV to drive on a beach sand road. Using these makes the task faster and much easier. They are easy to use and do a great job.

I've purchased these a few times, I used them fairly often. They work as advertised, maybe a bit on the slow side and need to be re-tuned every now and again. If you're not using them several times a day, as I was, these may be perfect for you

These things save you time when you’re offloading they’re perfect you preset them you hook them up and you let it go and then when it gets to it needs to be on your air pressure then you put them back and go have fun when you’re done. are you charged back up?

Great product to quickly airdown your tires before going on the beach or offroading. Solid construction should last a long time. Indepensible addition to my off road kit.

Automatic tire deflators.I ordered the cheapest I could find on Amazon. Reviews were pretty good. I couldn't find any difference between the $13 and $80 set.What I learned. The $13 set claims pre set to 18 psi. They were not. Claim 3 psi increment, not that I can figure out. So, it took about 10 minutes per piece to get them adjusted. It takes 7.5 minutes to drop 15 psi. It's easy, they seem to work testing them in driveway multiple times. Will keep testing them.

These appear well built and feel solid. I adjusted all four for the same pressure on the same tire. However, when I used them the results varied as much ad 5 lbs pressure. Convenient by springs are a cheap metal resulting in inconsistent pressures. If you use these with lockers, check your pressure to avoid damaging your vehicle

Couple things... It does take a looong time for these to deflate your tires to the set PSI. My response to that would be adjust your schedule accordingly. I know some people who will put these on at the hotel and drive to the off road park with them on. Not saying that's what you should do, but it helps timewise. 2nd, if your tires didn't deflate all the way when you get to where you're going and you hit the trails with them still on, you will go below the set PSI. As you bounce up and down, crawl over rocks, make drops, etc... your tires go through different amounts of pressure. So even after it stopped letting air out at your desired amount (say 10 PSI) you could still drop down to 5PSI, or lower, so becareful.