On a bike trip waiting for a train, I stopped in at a used sporting gear place just across the street. They had a really cool looking mini pump by a boutique maker, mostly metal and not plastic, double heads for schraeder and presta, gage, just turn the barrel one way or the other to select the head, and high and low volume/pressure modes. Looks awesome. I hooked it up to my bike to try out; High volume became useless as soon as the pressure rose; Low volume/high pressure mode was *incredibly* low volume, it would have taken me a half hour to pump up a tire. I was so disappointed because it every other respect, it looked fantastic. I looked up reviews online, exactly what I discovered. That may have explained why it looked brand new; Someone bought it, tried using it once, got rid of it.

I now carry in the trunk bag, a Schwinn-branded pump that came on a bike I bought, single reversible head on short hose, gage, and a clever 45 degree swivel at the gage end that changes it from a cylinder to a T configuration that deploys a lever for my foot to hold it on the ground, much easier to pump with both hands, and faces the gage upward to easily read when pumping like that. Best setup I have seen, on a cheap pump. Like this, only mine has the older single reversible head:

Do Americans spell gauge “gage”?

https://www.merriam-webster.com/dictionary/gage

As hidetaka points out, yes, sometimes but not usually. I'm not sure if this is an example of the changes made to American English spelling in hopes of making it more phonetic. Of course, that's a futile goal, and we abandoned it over a hundred years ago.