This product follows the Grand Prix 4000 S II. With Continental's unique tread compound, produced exclusively in Germany, they have revolutionized the cycling scene. Thanks to the legendary Black Chili Compound, Continental has sustainably answered the eternal question of grip versus rolling resistance. Regular test victories demonstrate the measurable and noticeable advantages for riders, both in the lab and on the road. Vectran is spun from the molten liquid polymer Vectra and processed into a multifilament yarn. Both spider silk and Vectran possess enormous tear resistance at minimal weight. These are exactly the right properties to be used as a puncture protection insert in a top Continental tire. A Vectran breaker is lighter, more flexible, and provides more effective protection against cuts than comparable nylon breakers, without affecting rolling resistance.