Crankbrothers GEM Hand Pump Compact and Lightweight - Black Category_Tubeless 30 Day FREE Trial of

30 Day FREE Trial of Ride with GPS for new Ride With GPS Premium users

Sensor device : ECG

30 ml (approximately 1 oz) for 700x25c (25-622) tubeless tyres

has passed IPX7 waterproof test

Crankbrothers GEM Hand Pump Compact and Lightweight - Black Category_Tubeless 30 Day FREE Trial ofGEM The compact, lightweight dual stage hand pump, featuring patented high volume high pressure switch technology. Gem pumps feature a hybrid alloy composite construction for low weight and high strength Our lightweight Gem pumps also feature a convertible head for Presta or Schrader valves, and a patented high volume high pressure air switch: use the high volume mode under 40 psi for quick inflation, then rotate the switch to the high pressure mode