If you are reading Four Wheeler, you probably aren’t the kind of guy (or gal) who calls AAA when you get a flat. And that is assuming that a tow truck could even get to where you are wheeling anyway.
The ActionJac self-contained screw jacks from Nook Industries, Cleveland, Ohio, are totally mechanical, so there are no hydraulic hoses to crimp and maintain and no hazardous fluids that can leak.