Thanks to its duraskin anti tear fabric the grand prix 4 season holds up under extreme conditions in the paris roubaix race the hell of the north cyclists equipped with duraskin enhanced tyres have the fewest tyre related problems during the race incorporating conti39s special wear resistant carbon compound the tyre is characterised by very good mileage performance as well as excellent adhesion on wet roads and at low temperatures vectran breaker vectran is a synthetically manufactur