When your adventure takes you off the highway and on to the trail, you may need to air-down your tires for a smoother ride and added traction. When you return to the pavement, you need a way to air your tires back up to be safe and get the best mpgs. Carrying a portable compressor makes this quick and easy. The Viair 450P Automatic Function Portable Compressor is a great option for most overland vehicles. It is suitable for 37 inch tires and larger, and has a few features that make airing-up much quicker than many other portable compressors so you spend less time inflating and more time adventuring. It has a 100% duty cycle, which means it can work harder for longer periods of time. It has an automatic shutoff function that powers down the compressor when it is not activity filling tires so you don’t have to turn it off between filling each tire. It also allows for on-the-fly tire pressure reading so you don’t have to turn it off to check the tire pressure.