Crankbrothers Gem Pump

The Gem features a switch on the pump head that allows you to toggle between high-volume and high-pressure modes. High-volume mode is designed to move more air quickly to seat a tire, while high-pressure mode makes it easier to reach the final, firmer PSI once the tire is already inflated.

Yes, the pump head is convertible. You can easily switch the internal components to accommodate either Presta or Schrader valves, making it compatible with almost any bicycle tire.

Absolutely. It is constructed from 6061 aluminum, which is durable enough to handle the vibrations and impacts of off-road riding without cracking or failing when you need it most.

The Gem comes with a mount that attaches directly to your bike's bottle cage bolts. This keeps the pump securely tucked against your frame, ensuring it is always accessible during a ride without cluttering your jersey pockets.

The Gem is rated for a maximum pressure of 100 PSI. This is sufficient for most mountain bike and hybrid tires, though it may take a bit of effort to reach that limit on high-pressure road tires.