The Blackburn Mammoth Anyvalve Mini-Pump will give your tires lots o' air. Essential for your off-road adventures, this pump produces a hurricane force air blast with its High Volume Barrel. The oversized design, made from strong and lightweight aluminum, delivers more air per stroke. So you can pump up quickly and get back on the trail. Works great on Presta, Schrader and Dunlop valves. No leaking, no fuss, clean and simple.