On the starting line, every gram counts when chasing the clock. The Supersonic 700C Presta 42 mm from Continental joins your arsenal to optimize performance. With a wall thickness that can go as low as 0.45 mm, this inner tube is the ally of cyclists seeking lightness and speed. But beware, lightness also means delicacy: increased vigilance against punctures is necessary.Perfect for those who collect medals like others collect stamps, the Supersonic propels you towards unparalleled performance horizons. Although its extreme thinness requires more frequent inflation, it offers rolling resistance that will make your opponents shiver. It's the ultimate compromise between speed and challenge! In short, the Supersonic is the cherry on top for demanding competitors. It requires a bit of attention, but in return, it offers incomparable rolling smoothness. Ready to take on the challenge? Then pump, ride, win!