The Crank Brothers Gem Pump is a lightweight hand pump featuring dual-stage technology with a high-volume/high-pressure switch. It is constructed from a hybrid alloy/composite to reduce weight while maintaining performance. The pump includes a convertible head for compatibility with both Presta and Schrader valves. Its high-volume mode allows for quick inflation. Additionally, all Gem pumps come with a bottle cage bracket mount for easy on-bike storage.