Originally Posted by
rpenmanparker
OP, if you decide to stay with CO2, buy the cartridges from a non-cycling source. You can search for air g*n cartridges if you use 12 g, non-threaded ones. I have paid as little as $0.67 each in lots of 25.
I paid $15 total for 15 threaded 16g cartridges on ebay.
BTW, carrying both is a good idea. If I flat, I usually put about 20-30 psi into the tire with a pump before using one 16g CO2 cartridge to put me over 100 PSI