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We get it -- your saddle bag is stuffed, and your back pockets are reserved for your gummy bear stash, but before you write off carrying a pump or CO2 for emergency road-and-trail-side flat fixes, take a gander at the Portland Design Works Ninja Pump. Just like actual ninjas, the Ninja Pump is an illusive beast, with a small stature measuring at only 5. 75in long, and power to do some serious repair. It threads directly onto your valve, either Presta or Schrader, for pumping by hand, or thread on a CO2 cartridge to give a quick burst of air for faster filling. The CO2 valve features a control knob so you can fully regulate the flow of CO2, dialing in the perfect tire pressure. This compact pump is small enough to stash with your gummy bears in your back pocket, or strap to your frame if you're short on space.