Crankbrothers Gem Pump

The Gem pump features a simple twist mechanism on the head of the pump. You can easily toggle between the two settings depending on whether you need to move a lot of air quickly for mountain bike tires or reach higher pressures for road tires.

Yes, the pump head is designed to be compatible with both valve types. You typically just need to flip the internal rubber seal or adjust the head to fit the specific valve on your bike.

Absolutely. The aluminum construction is chosen specifically for its balance of low weight and high durability, making it a reliable choice for carrying in a jersey pocket or frame bag on rugged rides.

While it is capable of hitting 130psi, keep in mind that reaching that pressure with a hand pump requires significant effort. The dual-piston design makes the process more efficient than standard single-stage pumps, but it will still require some elbow grease at the very top end.

Most configurations of the Crankbrothers Gem include a frame mount that attaches to your water bottle cage bosses. It is a secure way to keep the pump accessible without taking up space in your pack.