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Piston

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Piston

A long, slender shaft that runs through the center of a bike pump’s barrel and attaches to a t-handle at the top. When the piston goes up, it draws air into the barrel through a valve. When it goes down, the air is forced out through the nozzle. Also commonly referred to as the plunger.

Derek is an avid cyclist with more than two decades of experience in the sport, and currently resides in Denver, Colorado. He enjoys all types, including road, MTB, cyclocross/gravel, commuting, and touring. When he's not writing reviews and guides related to bike accessories, parts, and gear for TreadBikely.com, he's riding, talking about cycling, or thinking about bikes he can't afford. #rolloutblissout