This has been a life saver on the trail. It airs up my 40 inch tires in just a couple of minutes. I was surprised at the speed. This thing is super heavy duty and a great option for any offroader. It is a little cumbersome to drag out and hook up to the battery, but is a better option than waiting for other compressors that take 5 minutes a tire. Love the product.

Well, I just received this Alltop twin cylinder 12VDC compressor. The packaging was great. It was actually triple boxed. It's own box with pictures and descriptions. Then a "packing" box with styrofoam. Then Amazons box. So, I was fairly assured the unit would be in great shape when "un boxed". While the compressor does come with it's own air fittings, they are industry standard fittings. So, it's quite possible that your home air tools, i.e. blow guns, extension hoses etc. will work. It all depends on what kind you have.

As for performance. Well, here's a down to earth test. WE run 315 70 17's on our 2015 Jeep JKUR. When it comes to trail tire pressure, I've been running 10 psi for decades and have never had any issues. So, for this test, I bled one of my 315's (basically the same exact tire as a 35" tire) down to 10 psi. I then connected the compressor to the Jeeps battery and the hose to the tire valve. I started both the compressor and my phone's stop watch at the same exact time. Not knowing what kind of exact pressure is in the tire at any given time, which has been stated by many on here, I gave this compressor ONE MINUTE of pumping before I hit the power button on it to stop it.

With the Jeep engine running, that gave the compressor full voltage to use while pumping. At the end of one full minute of pumping, my 315 had been inflated from 10 psi to 25 psi. So far, so good. So, I bled that tire down again to 10 psi. I reset my phones stop watch and then, hit the power button on the compressor and the phone. This time I gave that compressor 1 minute and 15 seconds. At the end of that session, that 315 was sitting at 31 psi which, is my street pressure. Soooooo, with all that being said, at this time, I'm pretty darn happy with its performance. It is a tad LOUD but, what 12V compressor isn't!!! I had a Viair 400P before this and that compressor would take 2 minutes and 45 seconds to air my 315 from 10 psi to 30 psi.

I'm not one for lolly gagging around at the end of a trail day. I just like to air up efficiently and then head on back to camp or home or ? THEN I can relax. So, this compressor is about as fast in airing up a 315 from the low pressure of 10 psi to my street pressure of 30-31 as you can get for a 12V compressor. And for the money, I think it's well worth it. The CFM on this compressor is over twice as much as a SB one and it's only $3.00 more so, WHY NOT!

11/21/23 edit:

I've received some repetitive questions on this little compressor so, I thought I'd take a minute to answer to the general public just in case they're thinking of this unit. The question that's been asked more than a few times is: "Will this compressor shut off when it reaches it's max pressure"? NO, IT WILL NOT! To the best of my knowledge, none of these 12V compressors have a built in pressure switch. But, I've not bought them all so, I really don't know. I do know that the All Top didn't.

So, here's the mods I did to this compressor to accomplish a few goals.

1. These compressors, like ALL 12V compressors, will get extremely hot when used to pump air back into todays large jeep/truck tires for street pressure. If you don't think they get hot, you're mistaken. ALL compressors build heat when compressing air, it's a given. That's why all your commercial compressors used *finned* supply lines from the compressor heads to the tanks. Soooo, I added THREE computer cooling fans. One for each cylinder/head and one for the center manifold. Those fans are hard wired into the power plug. They come on immediately when the power is plugged into the compressor.

2. Since these compressors have no regulation to automatically shut off at a given pressure, I added a pressure switch. It cuts in at 85 psi and cuts out at 100. I installed it right in the rectangular manifold.

3. I completely discarded the printed circuit board that comes with the unit and wired in my own 125 amp relay to handle the large current required for turn-on and turn-off.

4. I added a small toggle switch to control the power to the pressure switch.

5. I also discarded that junk power cord that was permanently attached to it. Some may like it but I was not a fan of that cord.

6. In place of that cord, I installed an Anderson SY-50 connector and bolted it right to the cage of it. To power the unit, I build my own 6' power cord from Stinger brand ultra-flexible 4 gauge wire/cable. This wire/cable is so flexible it's like a fully cooked spaghetti noodle! I installed Anderson SY-50 connectors at both ends. One is for the compressor and the other is for plugging in to a mounted SY-50 connector on the front of our Jeep. I don't even have to lift the hood to get this compressor going.

7. I was not a fan of that little short hose that was permanently attached to the manifold. So, I removed it and drilled and re-tapped it for a standard quick release fitting that many of us use at home etc.

So now, instead of burning that new little compressor up each time I stop to check pressure, that unit stops dead on its own. I plug in that 6' power cord to it, the three 70mm x 15mm computer cooling fans automatically turn on, then I turn on the little toggle switch, the compressor runs for approximately 1/2 to 1 second and auto-shuts down. I then break out my Flexilla 25' flexible air hose and connect it to the compressor. Again, that compressor runs for approximately 1-3 seconds to fill that air hose and then shuts off.

When I begin to fill a tire, I give it around one full minute to get about 90% of what's needed for street pressure then release the trigger on the air chuck. Within approximately 2 seconds, that compressor shuts off! I then give it about 15-20 more seconds to reach my particular desired street pressure of 30 psi and at that time, the compressor shuts off. All the while, those fans are running and blowing air directly onto those heated cylinders and heads and manifold. Waaaaaaay better than just letting ambient air try and cool it down.

By the way, all those components/parts that I added, really didn't ad any bulk or any appreciable exterior measurements. It's almost as compact (if ya wanna call this one a compact compressor) as it was from the factory. Now, one more thing. OBVIOUSLY, since I did a zillion modifications to this unit, I threw the warranty right out the window! If this little compressor goes up in flames tomorrow after owning for a month and only using it for one or two times, then it's all on me. I eat it. But, to me, the modifications and the ultra beneficial results of auto-off-on, the fans, the elimination of that junk power cord and more, were/are worth it. I'd do it again in a heartbeat!

Awesome little compressor, best portable little compressor I've ever used, I was honestly surprised at the quality of this little thing, fixed hundreds of roadside flats and even pumped up a tractor tire or two, if your looking for a durable hi output portable 12v air compressor I highly recommend this one.

THE BEST AIR PUMP IN THE INDUSTRY! Way better than an sir tank. This inflates my RZR 37 M/T tires from 8psi to 35 psi in a under 5 minutes. Compact and reliable. ALL TOP CUSTOMER FOR LIFE!

So to bookend this, I have a 06 4x4 Roadtrek 170. I need 50 PSI on the front and 80PSI in the rear on the street. I air down to 30 psi on washboard roads. This little compressor will run the tires up in about 5 minutes or so. The analog gauge is somewhat inaccurate.... Here's what happens. Hook it up to the battery and the valve core and turn it on. (It will not turn itself off BTW) the gauge is about 10psi higher than the tire. My guess is that the hose is cheap and expands and / or the gage is reading the pulse from the pump... either way, that part is inaccurate.. so get used to over filling and bringing it down to where you need it.. What I've been doing is run my front tires to 70 psi and manually shut off. Then use the bleed button to drop the pressure into my needed zone. It's a good little device. I'm not sure how long it will last, but there were no strange sounds coming from it. It ran really smooth and somewhat quiet compared to my harbor freight cheapo. I would buy the one with the digital pressure on/off... but it will shut off at pump pressure, not tire pressure.. so you would still have to fuss with it. For my money, I would get this one and fuss with it as opposed to the digital set it and go one and end up fussing with it... I would buy this again..

This 12v air compressor that gets connected directly to the battery . I have 35 ” tires on my truck . I air my tires down to 15PSI for driving off road . This compressor gets me back to 35 PSI in way under 2minutes per tire. that's huge upgrade from what I use to have with my single cylinder air compressor

With my tire size the compressor does not get too hot to handle after airing up. My old compressor would get so hot I wound't be able to touch it and it would needed a time out before I can use it again or let my friends to fill up air . This compressor gets warm but not HOT. I put it in its carrying bag and throw it in the back in my rig with no worries.

The only complaints I would have with this compressor are it’s size, weight and air pressure gauge that is incorporated in the air line. The size and weight I can understand, it is a twin cylinder unit. The air pressure gauge on the other hand does not give an accurate measurement while the compressor is in use. The compressor has to be turned off in order to get an accurate reading from the gauge. but I guess thats just how it works .. because it pushes alot of air alot of PSI so that to be expected.

I would highly recommend this compressor to anyone needing a 12v compressor for improving their off highway driving! I will definitely update this review if an issue presents itself.

She's a beast. Got a little weight to it. Which is what you want. This thing puts the slime brand units so far to shame they don't know what they are anymore. ha ha. Shorter power cord (best that way) long hose with gauge and a backwards mounted coupler. If I do anything different to it I will just get an air hose mender and put regular couplers on it. Gauge reads about 5 psi high. Suggest checking your own from a known trustworthy gauge to be sure. It's pretty easy to set up. Kinda loud (also a good sign for a compressor), as far as I know it isn't pressure switched. Only on/off and I'm assuming thermal protection, so don't leave unattended while inflating. It boasted a lot of cool stuff. And it delivered. For a mobile emergency or multipurpose compressor, it is more than I ever had before. Big alligator clips because it requires 90amp DC. That's impressive in my opinion. I also added a good flat repair kit in the bag with the compressor unit.

This little guy is no joke. It airs up passenger car tires in less than a minute from 10 psi to 40 psi. It airs up my 37" tire from 15 psi to 65 psi in around 2 minutes on a 1 ton pickup truck carrying over 2,000 pounds of equipment. I'm thoroughly impressed with it

A little bit heavy but it’s a great product

Compressor is quite good BUT: it gets very hot after short use, the design is not great - the gauge is at the hebfat end if th hide but cannot be use when the compressor is in use. You have to return to the compressor to turn it off then back to the tyre to check the gauge and repeat until you reach the desired pressure. I tried to resolve this by buying a third party universal gauge but the hose in this compressor is not standard so not compatible.

Fast, powerful, trustworthy! All you need for overlanding! It pumps up 4 33” tires from 15 t0 33 psi in less than 8 minutes !

So far so good! This was recommended by a friend on the trail because I was airing up using an old (8 years old) motomaster air pump. Always took forever and got super hot.. but it did the job and I was fine with that. I splurged a little on this one and have used it several times already! Had to break the bead on my tires the other day to add balancing beads. Had my 37s aired up and reseated in 5-7 minutes I think (wasn’t using a stopwatch). I think this will save me so much time airing up on the trails! Hopefully it lasts a long time too

Fast, very fast. Took 4.5 minutes to pump up 4 35” tires from 15 to 35lbs