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

Initially all four were substantially off. However use them once or twice and readjust and they will be fantastic. All are within one PSI now. Would definitely buy again if lost, “borrowed”, or damaged.

Fast! Accurate! A few minutes a tire (35”) from 38 psi to 18 psi. Within a PSI of setting every time. Only complaint is the screw ring to lock in desired pressure is not secure enough. Screwing onto the valve stem can cause the lock ring to move and mess up your setting. You have to make sure and twist from the base in order to not accidentally move the ring that sets the pressure. Other than that, great product.

must have for off roading!! set your desired pressure, twist on and let it do its job. save you lots of time and makes it easy. definitely recommend for anyone that goes off-roading

Test each one as they're off a TINY bit. Worth the double check

I bought this more expensive one because all the other cheaper brands kept exploding on me this one hasn’t with daily use of 5 continuous weeks once a day, also the PSI you want goes under the bottom nut

Great product!

I’m happy that I tested them before I went out trail riding. I set them to 20 psi which is the lowest you can set them. It never stopped deflating the tires. I noticed the tires were almost completely flat and removed them. Set them to 25 psi and they stopped at 17 psi. Disappointing but they are still usable. Just know that they don’t perform at the level they’re supposed to.

I purchased these tire deflators from All-Top because I had previously purchased their air compressor set up for inflating tires and was impressed. I had read reviews and watched a lot of videos online about tire deflators and Staun seemed to be the gold standard, but the $99 Price tag was daunting and I wanted to ensure I wasn’t missing out due to quality or accuracy concerns if I purchased these from All-Top for $39. These have pre-set markings on them, and I dialed the setting into 15 psi on the All-Top deflators and put them on my tires. After about 6 min, all four my tires were within one or two psi of my desired setting. They were either 16 psi or 17 psi. Having watched reviews about these I knew that you could calibrate them the same way as the Original Staun deflators. So I used my up down, air tire deflator that removes the valve core and I lowered one of the tires to 15 psi and calibrated both these and the set from Staun on the same 35 inch tire on my gladiator. The pressure gauge on the Up Down Air tire deflator, and my computer on my gladiator both said that the tire I used was Inflated to 15 psi. The calibration process was easy. I then aired up all four of my tires using the All-top compressor, which took just a little over eight minutes Using a four tire inflation system. Then I used the All-Top tire deflators to deflate the tires and it took about 6 1/2 minutes to get them from 38 psi down to 15 psi. I used my jeep gladiator computer to test tire pressures and three of the tires were 15 and one of them was 16. I’m pretty satisfied with that outcome. The Staun deflators took more than twice as long to deflate coming in at almost 15 minutes, I had inflated the tires to 38 psi after my test with the All-Top. And they only deflated down to 17 on three of the tires and 16 on one of the tires. So calibration process was not as accurate and the air down process took way longer. Overall the All-Top system was more accurate and faster then Staun. Plus this system comes with nice black metal caps for your valve stems.