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Gear Question

We have a bike that has the Gem Pump in a...

We have a bike that has the Gem Pump in a pack but we're not sure just how it works. It has a pressure gauge on it and kind of looks like a hammer. Do you have instructions on how to use this item>

Responded on

http://www.crankbrothers.com/data/media/original/gem%20pump%20instructions.pdf