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There are 3 different types of vavles found on bicycles: Schrader, Presta and Woods/Dunlop. Here's a link to more info: http://www.sheldonbrown.com/gloss_w.html#woods

Schrader are the same as for car tires, and work the same way. Prestas have a locknut keeping the valve shut. This nut needs to be opened and the valve "burped" before inflation. Woods/Dunlop needs nothing extra once you've found a pump head that'll fit them.

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16y ago

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