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

while the long

By thinking about the wheel and tire as a system

64 color screen with an ambient light sensor to make it easy to see the metrics that matter most

Low-lead nickel-plated valve with a threaded valve and removable core

Challenge, Seamless Latex Inner Tube, Tube, Presta, Size:24-32C Our latest warmers feature anChallenge 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