LASFIT AIR D4 Adjustable Auto Stop Tire Deflator Kit (10-30PSI) 4pcs Screw on Tyre Air Down Tool for Offroad 4X4 Overlanding (with 4 Valve Caps)

I ordered these along side the compressor. Used them once and they worked as designed. Product is accurate give or take a psi which is standard for all things air pressure related. Very light weight and very easy to store as the product is small. Comes in a small zipper bag that can be stored anywhere. Product appears to be good quality. They deflate the tires relatively quick as well and once the tire deflate to desired pressure, product stops removing air as designed. Worth every dollar spent on them. A must have when off roading.. Product is very easy to use as well.. So easy a caveman can do it.

About 2 psi off but reliably 2 psi off so it could be me.

Used these LASFIT deflators on my Defender before hitting the trails — super easy to set up, and they stop right at the pressure I dial in. Really saves time airing down all four tires at once. Solid build and perfect for off-road use!

The LASFIT AIR D4 deflator kit includes four screw‑on air down tools that automatically release tire pressure until a preset 10–30 PSI target is hit, excellent for overlanding, 4x4, and offroad setups. Built from durable anodized aluminum, each unit allows for quick adjustment by twisting the collar—it includes easy‑to‑read PSI markings and clicks into place for secure locking. A neat feature is the integrated valve caps that stay attached to the deflator, reducing the chance of losing them during service. In practice, the deflators deliver consistent, unattended release without need to peer at gauges. Once set, you simply slide them onto the tire valve stem and walk away. The aluminum bodies resist corrosion from water and dust. For added convenience, they come bundled in a compact carry case that fits easily in a glove box or tire repair kit. The only slight drawback is that in extreme cold conditions, sealing and turning the collar may feel stiff—but routine lubrication addresses that. Additionally, they cater only to standard Schrader valves, making them incompatible with metric Presta valve stems without an adapter. ⸻ Final Verdict: The LASFIT D4 adjustable auto-stop deflators provide smart, repeatable tire pressure control for offroad and off-grid adventures—earning 4 out of 5 stars, with minor deductions for cold-weather stiffness and valve type limitations. Highly recommended for road-trippers, offroaders, and overlanders seeking quick, accurate, hands-free tire preparation.

I so wanted these too work out. I own a jeep and have all the air down and up goodies as well as recovery equipment so I'm always looking for new gadgets that work well. These look well made, have nice psi markings on them. I only tested one of them twice and then a second one to make sure it wasn't me. Set psi to 20 tested with my digital gauge at 15.6 psi tested with my DeWalt inflater and came up with same number. Tried again same result. Tried a second one and got 16.2 psi. So either the markings are wrong or the valve they are using is junk. I definitely couldn't see paying full price for these. For now I'll stick to my single defator with pressure gauge and do one tire at a time.

We do a fair amount of off-roading and having a set of these set for 15psi has made air down so convenient. I have the ARB valve stem remover also. I prefer these since there is less chance of damaging a valve core in the process. I can typically put all 4 on and once im done putting the last one on the first one is about ready to take off. It takes a little fiddling to get it to the exact psi you want (if you are picky like me) but then you lock down the lock ring and they stay at that setting forever. I am considering buying a second set to lock in at 10psi to give me the option to have presets. For the money this is such a good value vs my time. I am not sure about durability but as long as you keep valve stem covers on then you should have issues with dirt infiltration which would cause a problem. If you do get these gunked up you can always dissemble, clean, and reassemble.

Set each deflator to 20psi per instructions (reference line at top of the deflator shell). Installed on 4 tires inflated to 37psi. Airflow stopped after ~1m40s. Tire pressures were 16.6, 15.0, 15.7 and 16.1. Remeasured with a second gauge with virtually the same results. Specified tolerance of +/-2psi is too large and these couldn’t even meet that! Save your tires and your adventure from disaster and either buy quality deflators or take the extra few minutes to deflate manually!

Love things that work! Especially when they come with a case (bag). They work, can't wait to use them for years. No complaints, they're pretty quick too.