Please see my original post:

Just checking alternative solutions. Every once in awhile a different think-outside-the-box solution comes along and takes awhile to displace the "common wisdom" even though it is superior.

So it doesn't look like this has happened yet.

 

i did see your original post. that's the best solution for you, given what exists today.

besides, say there was a can that worked. you don't think filling, checking pressure, filling, checking pressure, repeat, would get to be a hassle for your girl? at least with a portable, you see the psi right on the gauge.

 

That's why I'm getting one of these:

 

If there was a little can, it would be so expensive to just add a few psi. Those little bike inflator cans would add some but there isn't enough volume for a big car tire. I say just keep using the 12v one or get a 5-10 gal air tank.

 

Any decent bike these days runs Presta fittings. I don't know if those CO2 cartridge inflaters handle Schrader valves.