The Gem Hand Pump is compact, lightweight dual-stage featuring patented high-volume/high-pressure switch technology (use the high volume mode under 40 psi for quick inflation, then rotate the switch to the high pressure mode for easier pumping up to 100 psi).

• Features a hybrid alloy/composite construction for low weight and high strength
• Lightweight
• Convertible head for Presta or Schrader valves
• Patented high volume/high pressure air switch
• Bottle cage bracket mount included for convenient on-bike storage