I had a flat on my road bike this week and it was my first flat in 7 years (not much debris on the roads) and the first time I used a CO2 canister. Well, I am proficient at fixing a flat on the road with a pump but I was about as proficient as a gorilla using the CO2 canister. I carry two and immediately squandered the first one in my attempt to connect the cartridge to the valve system provided to control the air into the tire. It was high 40s outside and the cold CO2 cartridge, leaking connections and my fumbling left my fingers very cold and I did not have the tire on the back on the rim yet. I completed the fix and then used the second cartridge to get some inflation. Off I went but with very little pressure in my tire .
1. The cartridges get very cold upon discharge so use one’s glove to hold it to protect skin from potential leaking CO2 and cold cartridge.
2. Have at least two cartridges and I now carry three. One cartridge provided about 40 psia.
3. Practice once in controlled conditions.
4. All cyclists that went by offered assistance.
5. The CO2 that is now in the tire will leak out in a couple of days. After one returns, release the CO2 from the tire and re-inflate with air.
How many canisters does it take to inflate a tire on a tandem up to 120 psia?