J.T. BrooksAutomatic Tire Deflators PRO II (ATDPII-4)

Have only used this product once to test it right after it arrived. Have 35" tire on our Jeep and run them at 38 PSI on the street. I used the JT Brooks Pro to deflate the tires down to 25 PSI. Three of them were dead on 25 when they stopped and one was at about 24.5. Verified with tire gauge that I trust. Need to try them at different PSI, but as of now, that's about as accurate as it could get. I set the body on the deflators so that the 25 PSI mark was just barely visible and locked it in, making sure that it didn't change the setting. They are not super fast, but that's good, because it allows you to put all 4 on at the same time. All Top makes deflators that work exactly the same way for less money. They get some good reviews, too, but I have never used them. One reason I bought these is that they are made in the USA. I have enough stuff on my Jeep that is made in China!!! Would buy them again. If they don't work at other PSI's I will update my review.

I’ve seen minor accuracy issues reported by others, 1-2 psi isn’t going to create a critical failure of any kind. These are expensive, but mine are manufactured in the USA, not sure if they still are as I purchased mine 8 years ago:) I use them on my jeep tires and they work perfectly every time and I wheel a lot. Highly recommend the co2 air refill systems (power tank) for speed and convenience of refilling air extra quick like, but refilling the co2 tanks can be very hard in my area (Seattle) not a lot of options and they hassle you for not just swapping your tank. Anywhoo the deflates are top notch and worth the money as build quality on mine is excellent

I bought these to deflate 35" Jeep tires for off-roading and 35" F350 tires when towing our camper into sand dunes. These work great and they are very accurate to the PSI you set them to. I am able to get down to desired PSI faster than my friends that use 4 way connectors as those take way longer to setup.Only issue I have seen is that the valves have worked themselves lose when deflating the tires on the F350. I did lose a lock ring on the sand. I contacted JT Brooks customer service to look into getting a replacement locking ring, and they responded immediately. Great customer service. I will need to make sure I am locking these tighter when using on the truck.

They work. Mostly. If you don’t mind being off by 1 or 2 psi these are pretty nice. I’d say they air down my 33s in about 4 minutes. But the annoying thing is that no matter how precise I set them, (counting turns etc) they are off by a couple of psi. Only a problem if you monitor your tpms while wheeling. Just bugs me a little. With that said these devices easily beat doing each tire individually. I’ll probably pick up a set of Staun. I have a feeling they will be right on the money.

I received my J.T. Brooks Automatic Tire Deflators PRO yesterday. First impression was that they felt well made. I adjusted all 4 of them to 15 psi, which took probably less than 2 mins. They are extremely easy to set. And once set, I can tell that they can't be accidentally moved. The locking ring holds the setting perfectly. I just did a quick setting, adjusting them by eye, and they were pretty close to being right on. #1 tire was 15.7 psi, #2 tire was 14.8 psi, #3 tire was 15.3 psi, and #4 tire was 16.1 psi. I think that is pretty close for just setting them by eye. I will go back and dial them all in at exactly 15 psi and see how well they hold the setting and if they vary from tire to tire. So I am giving them a definite 5 STARS!!! These are a must for any off-roader. They allow for quick and effortless airing down of all 4 tires at the same time. I've owned other deflators from various companies ranging in price from a couple dollars, to over $65. These, being $95, are the most expensive ones I've tried, and seem to be the best out of all of them. They are for sure the easiest to set. I will update my review if anything changes, or something happens to them. But for now, I say dont bother buying any of the other deflators. Spend the extra money and get the best ones from the start. If you don't, you will eventually end up buying these anyway.**UPDATE**So I have them dialed in now. They are all within .2 psi of each other. The only thing that has changed is that I would like to give them 7 stars because I like them so much. I went out with my Jeep club, and when we all aired down, I was done and waiting for everyone else. A bunch of people asked what I was using or thought I couldn't have let enough air out. But I told them about J.T. Brooks, and showed them I had 12 psi in all 4 tires. People were amazed at how quickly I aired down all 4 tires.

I use these at least 4 times a month, sometimes deflating tires on two vehicles each time. Based on our Jeep dash reading, they are just about spot on every time. I am buying a set for my daughter's Jeep.

These are a breeze to set up and use. They really reduce trail prep time by deflating the tires much quicker than using a single deflater. Just set your psi limit, screw the deflator on to the tire, pull the deflator's center stem and move to the next tire...air will release from each tire until it reaches your set limit. While these may not be the least expensive, they've been the easiest (simplest) and quickest deflator devices I've used so far... I recommend that during first use, cross check the deflators psi markings against a tire gauge you trust - then lock them down and your good to go...enjoy!