How to choose and change an inner tube

<p>A value-priced tube that’s great to carry as a spare.</p><ul><li>Fits 700 x 23-25C road bike tires</li></ul>

MEC 700 x 23-25C Tube (48mm Presta Valve)

Bicycle tubes are valve-specific. Presta – narrow, with a built-in valve cap that you loosen when pumping up the tire and tighten again afterwards. Schrader – wide, with a pressure valve similar to those on a car tire. 

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MEC 700 x 23-25C Tube (48mm Presta Valve)

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