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For the coloured GP4000 tyres, the activated silica compound improves the handling at stability limits and gives great rolling resistance. The anti-tear formula in the rubber compound prevents tread brittleness while increasing mileage performance. The extra special thing about the GP 4000 and GP4000 S is their puncture protection made from Vectran™ liquid crystal fibres. The patented Vectran Breaker reconciles the conflicting goals of low weight, low rolling resistance and top puncture and cut resistance in a fascinating manner. The Vectran™ fluid crystal fibres were developed for airbag systems in the automotive and aerospace industries. The material is extremely tear and cut resistant and is also flexible. It retains these properties even under constant stress - as opposed to Aramid.
