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.

• 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.
• Sizes: for Road/wider Road 23-30mm and for wider Road/Adventure 29-38mm.
• By far the cheapest way of improving the performance and overall feel of your bike!.