Crankbrothers Gem Pump User Manual

TECHNICALMANUALS
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Step 1: The Gem Pump Clip mounts to your bicycle
frame using existing water bottle cage
bosses and hardware. Remove the water
bottle cage bolts from your frame to install
the pump clip.
Step 2: Place the clip onto the frame and secure using the existing
hardware. If using a water bottle cage, the clip mounts
underneath the cage. Longer hardware may be needed and
can be acquired from your local dealer if necessary
Step 3: Install the bottle cage bolts back into the
torque provided by your frames
manufacturer.

Crankbrothers Gem Pump Specifications

General

Brand	Crankbrothers
Model	Gem Pump
Category	Bicycle Accessories
Language	English

Summary

Bike Mount Installation

Mounting Clip to Frame

Mounts the Gem Pump clip to your bicycle frame using existing water bottle cage bosses.

Securing the Clip

Places the clip onto the frame, potentially under a water bottle cage, using existing hardware.

Reinstalling Bottle Cage Bolts

Installs bottle cage bolts back into the frame, securing them to the manufacturer's specified torque.

Pump Head Reversal

Prepare for Reversal

Unthread the valve cap and swing the lever outward to release the gasket and plastic adapter.

Rotate and Reassemble Adapter

Separate the gasket and plastic adapter, rotate each piece 180°, and reassemble them.

Complete Reversal Process

Insert the gasket and plastic adapter into the pump head with the gasket side facing out and secure the valve cap.

Instructions for Use

Presta Valve Preparation

For Presta valves, unscrew the valve locknut and tap to ensure it is not stuck before inflating.

Attach and Lock Pump Head

Push the pump head onto the valve and lift the lever arm to lock it into place.

Set Pump Mode

Rotate the air switch clockwise for High Volume or counter-clockwise for High Pressure mode.

Stabilize Pump

Support the pump head by placing your palm on its backside and grasping the spokes.

Unlock and Remove Pump

Rotate the lever toward the pump to unlock the head for removal from the valve.

Final Presta Valve Check

Ensure the Presta valve is closed after finishing the tire inflation.