Schwalbe s one tubular road bike tyrethe schwalbe s one tubular road bike tyre is a tyre for the toughest jobs thanks to its large volume and v guard protection featurescarcass handmade tubularsize 700ccompound onestartechnologieslevel 5 v guard an extremely cut resistant hightech fibre makes it possible to ensure even on very light tyres an extraordinary high level of puncture resistance in combination with snakeskin sidewall protection its called double defense technology handmade tub