By thinking about the wheel and tire as a system

Our latest warmers feature an softer Thermal fleece fabric with improved stretch

It’s a perfect ‘all over’

Treat yourself with some comfort and looks

Challenge, Seamless Latex Inner Tube, Tube, Presta, Size:24-32C By thinking about the wheelChallenge 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