I went to refill my 10# tank and they offered me a 20# tank for 25$ including Co2
Needless to say I have a big ass tank where the 10# was. I added a ratchet strap on top of my two rubber quickfists. It looks pretty ridiculous I’ll admit in the TJ LOL
As a former very avid scuba diver with 3 tanks in my shed I wouldn't want to use one as a tire refiller. Too much pressure (1800-2000 psi) in them for me to want in the back of my TJ while offroading. CO2 is the way to go, there's only something like 150 psi in them.