Outstanding wet braking performance when new and when worn. The Primacy 4^s are rated the most silent and comfortable ride vs other premium brands.* The EVERGRIP TECHNOLOGY provides outstanding wet grip, thanks to new tyre sculpture, providing +50% of space to evacuate even more water (when new and when worn) compared to previous generation tyre. New rubber compound, bonding rubber and silica more strongly and evenly, provide more uniform energy dissipation upon contact with the road. The 2nd generation silent rib technology provides a silent, comfortable ride thanks to inter-locking bands between tread blocks that minimize air pumping sound effects as the tyre is rolling. *Interior noise testing at 50-70 kph and comfort assessment at 30-50 kph.