Where do you haul thge air compressor... changing air pressures in your tires as you change roads... bull!
Comes from doing most of my driving in countries where there are still unpaved tracks to enjoy. For instance the Canning Stock Route in Australia - 2000km of washboard that killed 5 mercedes off-road vehicles with factory mechanics following them - because they ignored sensible advice to slow down and run lower pressures.
South America where you can be off paved roads for days at a time etc etc. Morocco the same. No Good Sam anywhere there either so you wreck it, you fix it.
Where do I haul it - A good 12v compressor will fit in a shoe box so just leave out a slab of beer and carry two 12v compressors like I do.
Actually I tend to go the other way in those sort of situations - run the lower pressures on the dirt and if there is only twenty or thirty miles of pavement, just drive slower on the pavement.
So no, I don't air up the tyres again every time there is a half mile stretch of pavement because that would be even sillier than NOT airing down when faced with a hundred miles of rough roads.
Of course all this theory is useless unless you go to the trouble of weighing each axle - and preferably each tyre group - separately and then check the tables.
