Boulder Tools Tire Deflator - 80 PSI Air Pressure Gauge - Adjustable, Automatic for Cars, Trucks and Motorcycles - Ideal Offroading Accessories

I ordered these to use as deflators for my Jeep, to be used for offroad needs for lower tire pressure. I find the deflators to be nice quality, very fast, and about as accurate as a mechanical spring closure allows. You do have to manually set the final deflation pressure you want by manually adjusting the unit (and then you can lock it in with the included jamb nut). Once you lock them in, they are set but can easily be readjusted to whatever pressure you want. There are several good videos showing how to set these. It is as easy as it looks, maybe even more so. The included pressure gauge is accurate and well-protected by the rubber bumper, so hopefully will have a long life. The other accessories including extra valve stems and two different sets of caps, one set of 4 metal and another 4 plastic, are a nice addition. The case is not great as many note in reviews, but it will work for a while. I think these are a bargain all in all!

Work as described and a great price.Easy to set up. I set them up on an extra tire in my shop and checked each twice. Accurate within 2 lbs.I have always used the type that removes the core and slides to deflate and have 3 brands of them. Old knees don’t like squatting to do this as much as they used to so wanted to try this type without dropping $100 for the big brand.Used them at a trail ride last week and then checked pressure and all 4 within 2 lbs of each other. Very impressive for the price point.The gauge that comes with them is a couple pounds off compared to my calibrated gauge but so is almost every gauge I have including some decent digital ones so not a big deal. I didn’t buy for the gauge anyway.

I found the entire kit to be well built and prepared. They even give you a little guide on how to properly close and open the hard case to store these (need to read it). Brass deflators are adjustable but you must set them up ahead of time using a similar sized tire (air volume and casing) and set the preload on the adjuster and lock the lock ring. Once done, you can just spin them on and down the tire goes to the setting you set them up at (in my case 20 psi on a LT285/75-16 tire). The gauge needed to have the sections tighten up by hand but works perfectly good compared to higher cost gauges (+/- 2 psi). The nylon fabric case houses the deflators (all 4) plus the folded instructions. Case works fine if you follow directions to close and load the lathes before snapping them. Would buy again and recommend for others. You need to have a minor set of skills and a little time / patience to set up initially. AND.....take them out before hitting the trails, they are not meant to get dirty and leave in all the time..

Decent kit for the price. Used once it works good. Little adjustments to get dialed in.

I frequently drive out on the beach to surf and/or fish (about 3-5 times per week.) Prior to purchasing these, I would either sit and deflate each tire by hand. It's slow and if you have any knee or back issues, it isn't comfortable.I purchased these as a Christmas gift to myself since they were on sale for $20.Setup is pretty easy. I first manually deflated one of my tires down to my desired pressure. (15 PSI for me). Screw the deflator on and slowly loosen the cap until you start to hear air come out. Tighten the cap just enough so air stops escaping. Tighten the lock ring to the cap and you're all set.What usually would take me about 15 minutes to deflate now takes five minutes. They are made of brass and definitely will hold up to the salty environment here at the beach. The kit comes with a tire gauge that's accurate within about 1 PSI of my other tire gauges. It also comes with a set of valve cores, a core removal tool, and two sets of valve stem caps. The carry case is a little flimsy, but the deflators come in their own little pouch that you can conveniently put pretty much anywhere (I keep mine in the sunglasses holder.)I do have one minor gripe: It's very easy for the lock ring to loosen, especially if you accidentally drop a deflator, and then your adjustment is now out of whack. Not a big deal, just don't be as clumsy as I am.All in all, I really like these and you can get 5 sets of these for the price of a set of Stauns (which more or less do the same thing).A couple tips I have:1. Set your deflators 1 PSI lower than what you actually want. The last bit of air to get out of the tires takes a long time before the deflator shuts off. Once the air is barely trickling out, remove the deflator and you'll be right at your desired pressure. This saves you a couple minutes of waiting for the valve to finally close.2. Don't use the adjustment cap to screw the deflator on, use the main body, otherwise you might accidentally make a pressure adjustment.3. Always, ALWAYS check your tire pressure after using the deflators to make sure they are functioning properly4. I'd recommend not driving with these deflators on. You'll run the risk of getting dirt/water/sand/mud in then and they may not work properly.