The Bontrager Air Rush Elite CO2 Inflator is a really handy item to have with you in your jersey pocket, bike luggage or back pack. It can easily stow away in a pocket or bag and is compatible with both Presta and Schrader valves so you can quickly inflate your road, city, or mountain bike tires when you’re in a pinch. A spring-loaded locking mechanism makes inflation easy, and a rubber sleeve on the CO2 cartridge keeps your hands comfortable during use.