Challenge Latex Inner Tube Size:700 x 28-35c Machined aluminum barrel and piston

Machined aluminum barrel and piston

Tackiest/Best Hand Feel

Created especially for braking on carbon surfaces

Endurance Geometry: The Caledonia-5 is designed with an endurance-oriented geometry

tacky touch for ultimate grip in every condition

Challenge Latex Inner Tube Size:700 x 28-35c Machined aluminum barrel and pistonChallenge 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.