A CO2 canister typically consists of a small, lightweight metal cylinder filled with compressed carbon dioxide gas. The canister is threaded at one end to attach securely to an inflator head, which is used to release the CO2 into the bicycle tire. The other end often features a puncture-resistant seal to keep the gas contained until needed.
To use the CO2 canister for puncture repair, a cyclist first attaches the inflator head to the valve on the flat tire. By releasing the gas from the canister through the inflator, the tire rapidly inflates, allowing the rider to resume cycling quickly without the need for manual pumping.
These canisters are favored by cyclists for their portability, speed, and ease of use during emergency tire repairs on the road or trail. It's important for cyclists to carry spare CO2 canisters and an inflator as part of their repair kit for a convenient and efficient solution to punctured tires.