Challenge, Seamless Latex Inner Tube, Tube, Presta, Valve Length:48mm and decrease your stack height

and decrease your stack height for the most aerodynamic fit on your bike

Lightweight construction

The unique properties efficiently breakdown grease and allow for simple cleansing of bottom brackets

Shimano HYPERGLIDE+ technology is integrated to provide seamless shifts both up and down the gear range

The Park Tool BCB-4

Challenge, Seamless Latex Inner Tube, Tube, Presta, Valve Length:48mm and decrease your stack heightChallenge 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