Drive how and where you want: the world's number one for stationary, messenger and urban cyclists. The right link for tough circumstances. The right choice for solid performance in the city and on tour. Leak-proof protection With our Polyx Breaker®, we bring our car expertise to the bike tire segment: polyester has been successfully used in car tires for years and has been tried and tested time and again. The extremely resistant polyester fiber is cross-woven. In this way, a very high tissue density is achieved, so that the circuit breaker is not only more resistant to foreign objects, but is also particularly resistant to punctures. Tires with Duraskin® sidewall protection must be able to roll with the punches. They are used in the toughest conditions. On courier bikes, tires slide along curbs; on touring bikes, they cross continents without wearing out. In cycling, they have to pass tough tests like the Paris-Roubaix. High-quality polyamide fabric protects the tire carcass from the worst conditions. These tires are distinguished by their brown sidewalls.