Challenge Latex Inner Tube Size:700 x 33-40c It’s been hard work but

It’s been hard work but it’s been very worthwhile

SpeedCore is an innovative tubeless-ready construction that consists of a thin air-tight layer of rubber compound infused of aramid particles

The curved design allows this longer more rigid pad to contour the rim for better brake performance

Unique features include an innovative folding pivot to store and fold with ease

the Base 2

Challenge Latex Inner Tube Size:700 x 33-40c It’s been hard work butChallenge 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.