The Bell® AirStrike™ CO2 Tire Inflator is a fast and easy way to inflate any bike tires while on the road or trail. The Bell® AirStrike™ CO2 tire inflator is extremely lightweight and compact making it the perfect inflation accessory. Their small size and light weight make them easy to mount to your bike frame, or simply carry in your backpack or hydration pack. The Bell® AirStrike™ CO2 tire inflator comes with one 16g threaded cartridge and is compatible with both 12g and 25g cartridges. One 16g cartridge can easily inflate a completely flat tire in seconds. The Smart Valve pump head auto adjusts to fit Presta and Schrader valves without an adaptor.