The Ultra High-Performance all-round road race tire. 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. For use with inner tubes only