Challenge, Seamless Latex, Tube, Presta, Length: 47mm, 700C, 29-38C

* Challenge produces the only seamless 'one-piece' latex inner tubes on the market providing a smooth, balanced ride with no pucker or bump like those found on other tubes* Latex tubes are lighter, thinner and more flexible than a butyl tube, increasing your comfort, lowering your rolling resistance, and helping to prevent flats* Includes a removable core Presta valve making them compatible with both inline and external valve extenders