Hromee Automatic Tire Deflators Kit for Jeep, Cars, Trucks, ATV 6-30 PSI Adjustable Air Deflating Set with Gauge

I was about to try the $90 ones and saw these, Read reviews and thought to give it a try. Dang they work great! Watch a youtube video on how to set the first one on first tire. Then use that tire at correct pressure to set the remaining three. Once they are all set just jump out when you want to air down, walk around and put on each tire. in about 4-5 min all are done at at set pressure (I use 13lbs) I absolutely love these, makes air down so fast and easy, No longer sticking my key into valve and squatting down for 20 mins to air down. Just screw these on, tend to other things and take off once air releasing stops

These work fine but not perfectly. I mean you can get it to do what you want no problem but don't set them up identically. You have to do each one individually. Set a tire at the right pressure and use that to calibrate the other three. Great little kid and they went with me to Moab for Easter Jeep week. Used them quite a lot airing down sometime several times a day. Really nice to just be able to drop all four preset on your tires and then take them off when they stop hissing!

Spring loaded pressure valves can vary a bit, but if you take a few extra minutes to set them up properly and give them the best chance to work well, they are pretty accurate and consistent. These work by using a spring and corresponding adjustable cap to vary the release valve pressure required to close the valve. The majority of the mechanics are brass and likely a light stainless or coated steel spring, but there are also rubber gaskets and o-rings. To get the most consistent accuracy, my advise is: 1) to disassemble (carefully) and lightly oil the o-rings with a silicone lubricant. 2) reassemble 3) set 4) reinflate tire and test 5) adjust 6) repeat 4-5 as often as needed to get consistency 7) lock the set ring down (with dual pliers) 8) test again (revisit 4-5 if adjustment is needed) After about 30 min, my tires consistently drop to 20# every time, regardless of which tire or which deflator I am using. Checked them in the garage in the morning...and again in the sun in the afternoon...20# on the nose each time. Yes they can vary by 1-2# either way (it's a wire spring so precision is gonna be tough) so set them about 1-2# over your lowest comfortable pressure and spot adjust as needed (realistically, running 10% from your target isn't going to make much of a difference (18# v 20# or 15# vs 17.5#)) But to be cautious set it 10% ABOVE your lowest desired pressure, you can always drop more manually but adding back is a pain. Running 33s on a 4runner and takes about 3-4 min to drop from 35# to 20#.

Went out to the desert in Borrego with my brothers to do some fun and semi challenging off roading. My one brother had this exact set of deflators and they worked great! It was nice that they came in sets of 4 so you could debate all at once. My brother did say, that it did take some trial and error to get them set to the wanted PSI (we were at 20),and that it was no big deal. They seem to be well made, and now I have to set mine!

very accurate , I was looking for an easy way to let the air out of the tires to go on the beach with my truck , these valves are very accurate just screw them on and they will bring the air down to 14lbs which is perfect for beach driving, they can also be set to a higher air psi if 14lbs is to low. It also comes with a air gauge and a nice case well worth the price.

Wish it was easier to dial in the targeted tire pressure. You need a spare to set them up correctly.

These offer a great value. They need a little but more tweaking then other brands but at a 4th the cost is well work the extra couple of minutes to set it up. They are pretty accurate and have stayed locked into place. only complaint is the hard case is a pain to clip its flimsy. But again value is amazing and quality of the main product is excellent

A friend recommended these to use when we purchased a Jeep to drive on the beach. Once you adjust each device to the tire pressure you want, they work great and same a whole lot of time so you can drive on the beach.

Has no numbers on it, unlike other brands To complicated without numbers

Kit is nice , gauge works fine but to calibrate deflators is a process which is not easy

Work's great , take's a little bit of Time to adjust them but onece it's done they work good ! I set mine to about 17psi and they Always stop between 15 and 17psi ! Of course dont expect to have 100% accuracy on all 4 tires it's not what there made for ! Just screw them on and wait until they stop and then finish them by hand to have the perfecly equal psi on all 4 ! I juste love it it's a big time saving for me !

They work, nothing to really complain. Not as fast as I would want, but since you're not removing any valve stems, they're good enough. Best part is they're quick to connect/disconnect, so the next tire is done by the time you're done your current one.

The gauge is a waste and unreliable . The only thing I used from kit were the core valves and cap