The Ultra High-Performance all-round road race tire. Key Features:Dynamic:GSR – Improved Grip, Reduced Rolling Resistance and Longer Wear,R:Shield – Improved puncture protection under the tread while maintaining overall performance,Dual Integrated Tread Zones – Keeping the driving and braking forces aligned properly as cornering forces come into play.,Class leading lightweight design – Lower rotating weight allowing for quicker acceleration, low rolling resistance and supple ride..