Crank Brothers Gem Hand Pump

Lawfarm

Posted on August 30, 2016

Best mini pump on the market.

• Familiarity: I've put it through the wringer

I've tried all of 'em. Candidly, I really wanted to love one of the pumps that has a hose on it, because that seems soooooo convenient. But after trying the Crank pump, I've found the one that lives in my pocket. It works under all conditions, and I can carry one pump for mountain and road. The switch-function works really well--high volume/lower pressure, or low volume/high pressure. Even with road tires, I put a couple "high volume" pumps into them, and then switch over to finish them off.

Reliable, even after being submerged, dropped in mud, etc. Wash it off, let it dry, and then throw it back in a pocket or hydration pack. This one rocks.

Zach Lassek

Posted on August 24, 2016

Ain't Nothin' but a G-Thang

• Familiarity: I've put it through the wringer

I went with the Small Red pump and I keep it in my Dakine Low Rider hip pack... and you can't even tell it's there! The pump has the option to serve Presta and Shrader valves, just be sure to swap if you have Presta (comes setup with the shrader valve head). Very easy to swap out, hit me up if you need help figuring it out.

Super light and discrete, this pump is an on trail necessity.

Crank brothers continues to make really quality products and this pump is no exception! CB FTW.

Megan Allyn

Posted on August 19, 2016

Surprised how well it works

• Familiarity: I've used it several times

This is an awesome little pump. Works so much better than any other hand-held pump I've owned. I'll only use this on my bike from now on.

jordan emeryEmployee

Posted on July 20, 2016

Strong little guy

Pretty amazing you can break 100psi with this tiny little pump. I got this for a pump to fit in my small under seat saddle bag and it fits just right and isn't terribly hard to use. The switch for low or high psi is a very effective design.

Matthew Pizza

Posted on July 14, 2016

I have one on every bike!

• Familiarity: I've used it several times

I have three bikes so naturally I had to pick three of these up, one in each color. These pumps were great weather you have a presta or shraeder valve on your tubes. I feel like you get a good amount of air with each pump, more than you do with some of the other small hand pumps that are out there. This easy to use and best of all efficient. I've mounted all mine underneath my water bottle cages.

Matthew Pizza
Expert Gearhead
mpizza@backcountry.com
801.736.5363

Seth BarnesEmployee

Posted on May 16, 2016

Simple and functinal

If you just need something to have in the pack or laying around the house to re-fill those tires before your daily ride, this is the hand pump for you. Never had any issues, fits all types of tires and gets the job done. If there is one downfall it is not knowing how much pressure you are sitting at.

Santos

Posted on April 25, 2016

Avg. ride time: 4h 54m per week

PERFECT

• Familiarity: I've used it several times

nice pump, perfect fit on frame

Jimmy McMenaminGearhead

Posted on December 16, 2015

The perfect pump

• Familiarity: I've put it through the wringer

so small it will fit anywhere and no reason to not love this. both stem selections for any any kind of tire and it's very light.

Jack LGearhead

Posted on September 28, 2015

Great all around pump

• Familiarity: I've used it several times

This pump has sure come in handy. This excellent little pump weighs next to nothing and is quite small compared to most other pumps, its very short. It is also very convenient that it has both a shrader and presta valve available.

Emery GaylordEmployee

Posted on September 4, 2015

Nifty little thing...

• Familiarity: I've used it several times

This pump is great. Two extensions while pumping based on < 40 psi or over. The two valve option is simple and effective. It also weighs nothing. Mainly either keep it in my mtn bike pack or in the back pocket of my jersey while road riding. Very effective both ways.

Daniel GoodmanGearhead

Posted on August 18, 2015

Ride On

• Familiarity: I've put it through the wringer

I consistently get flats on my mountain bike, mostly from riding more than I should, but this little gem has saved me more times than I can count. It comes in two sizes dependent on what you need, the short fits within the smallest compartment of my Camelbak Mule without an issue, and works incredibly well for road and mountain bike tires. Obviously it isn't a floor pump, but with minimal effort you can get your tubes pumped up and ready to go in a heartbeat. With the ability to switch from Shrader to Presta valves and the light weight of 128-155 grams, I can definitely say I am thoroughly satisfied with this pump!

Travis Tzioumis

Posted on July 22, 2015

It works

• Familiarity: I've used it several times

I got this as an inexpensive insurance policy for getting aflat while mtn biking. It can be switched from Shrader to Presta valves quickly making it great for my mountain (presta) and commuter (shrader) bikes. It has become my main bike pump since the cheap floor pump I had decided to call it quits.

Sean Zimmerman-Wall

Posted on July 19, 2015

A Gem of a Pump

• Familiarity: I've used it several times

I have gone back and forth between pumps of various styles and ended up thinking smaller is better. I run tubeless, so I so rarely need to touch my valves, but it is nice in the event of a loss of pressure or if I need to throw a tube in. Short and fat is where it is at!

SLADE

Posted on November 26, 2014

Great little pump

• Familiarity: I've put it through the wringer

Compact, lightweight and easy to use despite it's small size. Easily stows in my cambelbak without taking up much room. Quality construction, durable, works very well. I only use it for MTB so I can't attest to how it works with high-pressure road tires.

Steven N.

Posted on September 3, 2014

I like. I like it, I say.

• Familiarity: I've used it several times

This is my first Crank Brothers purchase, and I'm impressed by the quality of this product. The pump is lightweight and includes a bracket for attaching the pump beneath your water bottle cage so you never need to leave home without it. The red color doesn't quite match my bike's colorway, but that's a minor quibble.



The pump attaches to my Presta valves no problem. Due to its small size, pumping is a bit more difficult than with larger hand pumps. I'm not sure if I could actually pump a tire up to 130 PSI with this thing as per spec, but it will get you pumped again to rol home without too much trouble.



One caveat about pumping with this pump: because the pump head is attached to the pump shaft, I worry a bit about the torque I'm putting on the tube valve as I pump back and forth. I think that perhaps the design Lezyne uses (with a tube attachment between the shaft and the pump head) is a smarter one to prevent so much pressure being put on the valve as you pump the tire.

Aaron BenderEmployee

Posted on April 8, 2014

Continues the tradition

• Familiarity: I've used it once or twice and have initial impressions

I have a high opinion of all the Crankbrothers products I have owned and this pump only furthers that. About ten years ago I owned one of their first mini-pumps and it lasted a long time. Just like that pump the Gem has two-stage action. It can pump either high volume, which is awesome for getting a head start on airing up a tire, or high pressure, which is perfect for topping a tire off.

This pump permanently resides in my pack and will be what I turn to should the need arise.