If speed is what you like, you definitely need the Grand Prix Supersonic Folding Tire. Its low weight and low rolling resistance allow for very fast speeds. This is provided by a special BlackChilli rubber compound which ensures an excellent grip in both wet and dry conditions and again decreases the rolling resistance. It is suited for high air pressures (20-622 to 12 bar, 23-622 to 10 bar). You will love the Grand Prix Supersonic Folding Tire if you are a triathlete, time trialist or a racing cyclist! ;"