Be mindful of the heat from the unit.  These compressors are not oil lubricated/cooled and thus they are not meant for operating for extended durations.  The cooler the air temp the longer you'd be able to operate it for. I'd suggest a minute or two on followed by 3-5 minutes cool down if you want to prolong the life of your compressor.  I'm a rural mail carrier and I get a lot of flat tires when my tires wear down significantly especially so I don't want to keep buying these and I want mine to last as long as possible.  

Follow the guide below for your application:

https://www.viaircorp.com/4x4-off-road/choosing-the-right-viair-model-portables

I have a set of Viair portable air compressor (the 400P series meant for off-roading 35” tires) now for the last 4 years and no issues with it.  They can be pricey, but you get what you pay for.