Speed and comfort, united in a tyre. the perfect choice for the city speedsters, single-speed bikes and fitness bikes. double puncture protection, good grip and light-weight design. the roughened slick tread speeds along on tarmac. certified for e-bikes to 25 km/h. Safety System Breaker : Puncture protection with system. The SafetySystem Breaker consists of Kevlar-reinforced, high-strength nylon fabric. Stitch and cut resistant, but still lightweight and flexible, the tire adapts better to the ground. Without noticeably increasing weight or rolling resistance, it protects the carcass from foreign bodies and contributes to a long tire life. In addition, tires with Safety System Breaker offer particularly comfortable driving characteristics.