Not to be smart but I have not had to add air away from home in 20 years. I am a stickler to tire maintenance. I guess this comes from working on trailers, most of which comes to me as junk.
I have tire pressure monitors in all my stuff and I physically check all my tires twice a month. Just did them today.
Chris
Hey Chris - I'm going to get you to buy me some lottery tickets ! (I know you take good care of your stuff, just saying there is some luck involved too).
Best Personal Use of my 12v compressor:
Had to make an overnight drive suddenly, to deal with a family issue. Part way through that trip, picked up a big (industrial) staple in one tire. Noticed the tire low, and topped it up with the 12v comp. so I could get to a lighted gas station. I
could have changed the spare at the side of a narrow rural highway in the middle of the night if I had to, but much preferred doing it
off the road, in a well lit area.
Best Helping Somebody Else Use of my 12v comp.
Neighbour got married. Service was in a little rural church near here. Wedding party comes out to go to an arbouretum for pics. As the Best Man is heading to his CRV, I pointed out that his front tire is just about on the rim, then told him I had a compressor with me. Nearest commercial compressor is at least a 15 minute drive away in the wrong direction.
People often say things like this and not mean it - but I knew the Best Man wasn't blowing smoke when he said "First thing tomorrow, I'm going out and buying one of those".
Back when I started carrying a 12v compressor in my car, there still were
some full service shops around. Even back then, I liked the convenience/security of having my own air source wherever I was - makes filling up air mattresses a lot less of a hassle too. With our climate here, outdoor commercial air lines can freeze up solid in the Winter - so even if you find one (not easy at times today), you can't be sure it's going to work. A basic 12v compressor is not that expensive, and the dual piston one I described earlier does a decent job even filling an LT tire. I've used 12v compressors enough that I've eventually worn out the chuck, but I've never had one freeze up on me.
Pretty well anywhere you jog or bicycle, you'll see tons of junk and scrap metal on roads. That's w/o even talking about construction sites - even LT tires get beat up there. Modern tires are pretty good, but once you consider all the garbage on the roads, it's a miracle that we don't get more flats than we do.....
(Knock wood... I'm tempting fate, as I'm heading out the door just now.....)
Rgds, D.