I carry the 150PSI tankless 12VDC portable compressor in a bag. Sits under my back seat in my truck.
Sitting it on the tail gate of the truck I can clip it into the trailer battery and air up all my tires around the trailer and truck. It is also my means for doing a quick BLOW OUT winterizing using a city water port adapter if we get get caught in heavy freeze all of a sudden.
Is most definitely part of my PLAN-B tools. As soon as the kids find out you have one the bicycles line up all day long wanting their tries aired up haha...
My Q Industries portable MV50 12VDC 150 PSI portable Tankless Air Compressor (AMAZON) has been with me since around 2005 even back in my tent camping days.
Roy Ken