Practically every time our tires hit the dirt, we air down. It makes such a tremendous difference in the ride quality and performance of the vehicle, it’s absolutely silly not to. Airing back up is ...

I’ve been carrying a VIAIR compressor in my cars for the past 15 years or so. When I was doing instrumented vehicle testing, before any car turned a wheel in anger, we’d get corner weights, torque the ...

Viair’s portable air compressor offers a back-to-basics pump with an analogue gauge and power that comes directly from the vehicle’s battery via clamps. It’s fairly compact, weighing only 4.5 pounds ...

If you have been reading4WORfor long you have likely heard us extol the virtues of airing down your tires on the trail for increased traction and an improved ride. Airing down can be as easy as ...

This article was updated in September 2025 with new products and information. A portable tire inflator is an important tool to add to your vehicle's emergency kit. But, as with many things in the ...

All new vehicles come equipped with pressure monitoring systems (TPMS), and many have run-flat tires, so you might not think having one of the best portable tire inflators is a necessity. But that’s ...