Continentals Top Contact Winter II Premium is a Special winter tire for electric bikes. These tires have optimized weight reduction due to foldable bead and reflective strips for higher safety in the dark. When temperatures drop these tires can handle the cold being resistant down to25C/-13F. Their proven tread pattern gives you the best possible grip in winter and Vectran Breaker delivers the highest level of puncture protection for whatever lies ahead. Vectran is a synthetically manufactured high-tech fiber from a natural model. Like spider silk, Vectran is a liquid-crystalline polymer (LCP). Vectran is spun from the melted liquid polymer Vectra and processed further to a multi-strand thread. Spider silk-like Vectran has an enormous tear resistance at a very low weight: Exactly the right properties to process into a premium Continental bicycle tire as a puncture protection insert. A Vectran Breaker is lighter, more flexible and protects more effectively against cuts than the comparable nylon breaker. Vectran Breaker does not adversely affect the rolling resistance.