Schwalbe s one road bike tyrethe s one is a road racing tyre for the toughest jobs with its large volume and v guard protection the s one is well prepared for such ordeals as the tour of flanders or paris roubaix features size700 x 30c typefolding carcass microskin tl easy colourblack skin micro psi 50 80 weight330gbuyschwalbe tyresfrom chain reaction cycles the worlds largest online bike store