VIAIR 400P-A EF Enhanced Flow - 40145 Automatic Tire Inflator Portable Offroad Air Compressor for Truck & SUV | 12V On/Off Road Tire Pump Air Compressor | 150 PSI (SAE, Alligator Clips)

Good Purchase ! ! Tremendous heavy duty compressor for off-roading. Fast air up 37" tires. Super reliable and 10 lbs not too heavy. Tough compact nylon carry bag holds everything - compressor, 30 ft coil air hose, air-gun, and so forth - all in one tough nylon case. Built-in SAE 12v connector makes easy connection w 12 AWG battery cable installed separately. The air-gun needs some work -- -- First, remove short floppy hose w lousy right-angle clamp. Port thread is 1/8 NPT. Use adapter to 1/4 NPT. Add brass twist-on chuck to Schrader - see photos. Now can use Schrader hose any length desired. And for easy connect to valve stem use JACO Lightning S2X extension w Self-Locking Nozzle -- -- Second, remove large 150 psi gauge. Again port thread is 1/8 NPT. Replace w MEANLIN gauge 100 psi (or 60 psi) w 1/8 NPT Lower Mount. Now have more compact air gun w custom length hose and better gauge for standard tire pressures

I paired this compressor with a 4-way inflator, and it's working great on my Jeep Wrangler tires. The airflow is impressive, and it's much quieter than the last Viair portable compressor I had. This one also wanders much less while it's working thanks to the rubber bumpers that connect the pump to the stand. And it runs cooler than I expected - after inflating all 4 tires from trail to highway pressure in one shot, the hose quick connect is quite hot but the pump body stays cool enough to touch. I like that the battery clamps are detachable with an SAE connector; I wired an SAE pigtail directly to my battery and it's much more convenient than clamps.

Overall I'm very happy with this air compressor. It's reasonably quiet and quick at filling my 35X12.5X17 tires. It's a must have if you off-road and need to air down your vehicle. All the parts feel like quality parts and it does feel built-to-last. My one disappointment is the pressure gauge itself. the increments on the gauge do not correspond to 1lb or 2lbs. Instead you get 3 division for the first 20 lbs - so 6.667 lbs per division. Then after that you get 5lbs per division. I'm running 35X12.5X17 tires on my Jeep JKU and I need 27lbs cold for the correct inflation for my vehicle weight. I've seen some gauges in VIAIR product photos that go up to 100lbs with more useful increments but my gauge goes up to 160lbs. So the gauge increments are too large. To compensate I tend to overinflate with this compressor - fast and easy. Then i use a more accurate separate pressure gauge to drop me back to my exact desired inflation pressure since guessing with this gauge is error-prone. I'm likely going to replace the trigger handle and/or gauge with something with better/more useful pressure increments. With that said I would still buy this again if i needed another portable compressor.

Could not be more impressed with this kit. The bag is tough with good zippers. The inflator is accurate and doesn't leak. The coil hose doesn't kink easily or swell. Very nice fittings. The compressor is fast and quiet. I just got back from a month-long trip across Texas, Colorado, New Mexico, and Utah. Used the compressor at least a dozen times. I can inflate all 4 of my 37" tires from 15 to 30 PSI in just a few minutes. Beware, it does pull a lot of power, so be sure to use good, heavy gauge wire if you are installing permanently.

Works as advertised. Fast inflation, not too loud, decent cables and alligator clips. Must be hooked directly to your car/truck battery terminals. Stays self-contained in the case (included). It does get warm after long run times and needs to cool off. The automatic inflation feature is convenient and is a must (it turns off compressor when it reaches pressure, and only activates upon demand).

I bought this to use with my Braptor when out on the trails. Works perfectly and delivers enough air for 37” tires.

High quality air compressor. Very fast tire inflation. The automatic feature is super nice. The inflation tool with gauge is top quality. Well worth the money. The customer service is also excellent.

Really nice and powerful air compressor but the cables are so short and the alligator clamps so tiny and cheap.

Upgrade this from 450p auto, takes 1min 20sec from 22psi to 35psi, my tire size is 265 70 18