The Serfas Big Stick is a Mini Pump which punches well above its weight. The Telescoping handle inflates high-volume tires fast. The dual head is compatible with both Presta and Shrader valves. The metal alloy body is durable and lightweight, while PU over molded grips offer a no-slip grip. The compact size fits jersey pockets or small packs, while an included frame mount bracket can mount between the frame and bottle cage.