Vittoria cross xg pro cyclocross bike tyrethis design specifically made for cyclocross is ideal for all trails where traction and control are vital on dirt or mud the cleverly spaced knobs make for a self cleaning tyre with low rolling resistance unlike the tubular version the tyre has nylon 150 tpi casing and a foldable bead for top performance and light weight featuressize 700x34mm and 700x32mmbead foldinglow rolling resistanceself cleaningprb 20 puncture resistant belting buy vitorr