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)

The ALL‑TOP Adjustable Auto‑Stop Tire Deflator Valve Kit exceeded my expectations. They were very easy to adjust, and the first time I used them, they hit my target PSI within one pound. That kind of accuracy right out of the box is impressive. They also come with a storage pouch and metal valve stem caps, which are nice bonuses that keep everything organized and ready to go. The build quality feels solid, and the auto‑stop feature works exactly as advertised. I was so impressed with how well they performed on my truck that I bought a second set for my son’s truck. If you want fast, reliable, and hassle‑free tire deflation, this kit delivers.

These ALL-TOP deflators have a nice heft to them and feel very solid and well made. The PSI/Bar markings are clear and easy to read. There is room for some variation (1-2psi) because of the way they adjust. But honestly, when I air down to 25 or 20 or 15 I'm more interested in softer tires for better grip and less potential for damage then I am for precise PSI. And they're fast! From start to finish (including removing and reinstalling valve stem caps) I aired down all four LT315/70/17 tires on my Bronco from 38PSI to 25PSI in less than 6 minutes with no squatting or kneeling on the ground or fiddling with things. I'm very happy with my ALL-TOP deflators.

Bought 2 pairs of these some years ago to use in my Jeep Wrangler YJ (1994) marker lights. The worked great; light is pure ambar, and makes my jeep look good at night. Lasted a long time despite me installing the marker lights upside down (with the drain hole up instead of down). This means that my lights were constantly exposed to water in the tropical heat of Panama, which eventually rusted the leads and caused one to fail (after about 8 years!). Cleaned everything up, replaced it with the spare I had, and everything is back to being great (and this time I left the drain plug facing down!).

Almost works. Followed directions verbatim. Set the dial to 20psi and they stopped at 25! Verified with 3 different gauges and vehicles TPMS! Still makes deflating a little easier and quicker.

They work perfectly, dropping the air pressure in car by 7lbs in 1.5min. Attach to all four. After the forth, only a very short wait. I set it to 20lbs but it dropped it to 18lbs. You should not be operating close to any margin, .i.e., close enough. Cost is great, well built, and it comes with 5 caps!

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.

I really wanted to like these because the idea is great and they’re supposed to make airing down quick and easy—but they just don’t work consistently. I set all four deflators to 15 PSI before using them. When I actually aired down my tires, one ended up completely flat, and the other three stopped at completely different pressures. That’s a huge problem, especially if you’re off-road and relying on even tire pressure for traction and safety. The biggest issue here is accuracy and consistency. If you can’t trust them to stop anywhere near where you set them, they defeat the whole purpose of using automatic deflators in the first place. Maybe I just got a bad set, but based on my experience, I wouldn’t rely on these. I’ll be going back to manually airing down where I can actually control and verify the pressure.

These are really useful if you ride off road especially in very rocky areas like we have here. Easy to use and fairly quick to deflate. My criticism is that they aren’t very accurate. And each one is a bit off from the others. So if you use all four to save time, which is the whole point, you won’t have very accurate results. Some will stop way before others. Still it’s a useable solution. Just not as precise as you want. That said, you don’t have to be within a pound or two when doing this.

安価な商品なので正確な空気圧の設定は出来ませんでした。 何度か試してみて希望の空気圧手前で大凡で設定、その後はエアゲージなどで手動で空気圧を合わせるなどすれば便利に使えます。 私はオフロード走行時に毎回使用してます。

A cost effective solution that takes most of the guess work out of airing down. Well built product that does what is intended to do and if not mistreated, will last long. They are not 100% accurate; may be off by 1-3 psi or so but just need to do your own “mini calibration” on the first go around and you’ll be happy.

gr8

Excelente

as advertised very happy