Blackburn's AirStik 2Stage delivers 2 pumping modes in one compact, easy-to-carry mini-pump so you can easily fill road and mountain tires. Low mode moves a lot of air per stroke for filling fatter tires, while high mode pushes air quickly to easily inflate high-pressure road tires. You change modes simply by pushing a button at the end of the handle. This dual-purpose pump fits Presta valves and features a sturdy aluminum barrel and shaft. It mounts next to your bottle cage with the included clips.