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. The tube also includes a removable core Presta valve making them compatible with both inline and external valve extenders.

Features:

• The only Seamless one-piece latex inner tube on the market
• Seamless & smooth, no bumps at the valve
• No "out of round, unbalanced" wheel
• Improves rolling resistance and comfort
• Strong and extremely elastic, thus very reliable
• Improves resistance to punctures
• Is lighter weight than standard butyl and some superlight butyl tubes
• Has a two-piece removable valve core for valve extender use
• Weight: 70 - 90 g