Crankbrothers GEM Hand Pump Compact and Lightweight - Black Category_Tubeless Sensor device : ECG

Sensor device : ECG

mountain bikes or hikers

Clamp Diameter: 31

with its 'composite' designation is derived from its 30% carbon fiber content

One removable internal compartment means a better organization

Crankbrothers GEM Hand Pump Compact and Lightweight - Black Category_Tubeless Sensor device : ECGGEM 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