ALL-TOP Adjustable Auto-Stop Tire Deflator Valve Kit (10-30 PSI) 8 PCS Screw-on Tyre Air Down Tool for Offroad 4x4 (with 5 Valve caps)

These are a great product! I have another set that looks identical to the Stauns, and these All-Top deflators work much better. These are consistent, but that depends on user care in consistently setting the desired pressure. These start very smoothly and shut off nicely. The lesser performing deflators had a simple flat-head valve seat, but the All-Tops use a chamfered valve seat, and I believe that is why they perform so smoothly and consistently.For my test, I set the deflation to a bit less than 20psi on the front tires and a bit less than 30psi for the rears. The fronts (both) automatically deflated to 18.5psi, and both rears went to 28.5psi. The reason for being less than the marked 20 and 30psi was that I set them just below the lines instead of exactly on the lines. The differences were trivial in terms of driving performance. One thing to be aware of is that after use, the adjustment should be backed out as much as possible without disassembling the units in order to relieve the spring compression and extend the product life.

Worked just like the more expensive ones. Where dead on with psi. Nice carrying bag and easy to use

Awesome product. Great way to quickly air down your tires so you have more time on the trails. I set all mine to 20psi and double checked with my tire gauge. All were within 1-2 psi. So simple. Wish I had this years ago.

I use these to air my tires down to around 15 PSI for 4-wheeling. They work well enough, in that they will deflate even a large 35" tire in just a few minutes, and they will reliably slow down once they get around their set PSI. However, they're not quite set-&-forget. I'd say they have about 2-3 PSI margin of error, and they often won't completely shut off once they reach their target. You're best served by keeping an eye on your car's TPM system as you use them, or manually check your tires once deflation starts to slow down. Otherwise, you might deflate them too much before they shut off. I've found that it's best to set the gauge on the deflator about 5 PSI higher than my target pressure to make sure I don't accidentally overshoot.

I used mine for the first time this weekend and they worked perfectly. All four tires deflated to the set pressure which matched my Jeep's internal reading. Solid and well built. I haven't used other deflators but I certainly don't see these lacking in any way.I also had a small issue with my order and received prompt and helpful customer service from real humans at ALL-TOP.

Works as advertised. Saves time airing down on the before hitting the trails.

These work well but accuracy isn’t great.

Very easy to use, just dial in your pressure and let them do their thing. Someone else pointed out and I'll repeat, the line should be in the middle of your target number, so if you want to go down to 20PSI for example, the 20 should be cut in half visibly on the dial.Accuracy was good and uniform across all 4 of my units.