about the Dunlop Tires SP Winter Sport 4D ROF

4D sipe system increases the number of shoulder area sipes to help enhance braking and acceleration on snow and ice 4D sipe system has self-interlocking sipes that maintain tread block stiffness to help provide excellent handling Entire sipe system combines to create even pressure across the tread face, which helps increase snow handling performance and cornering grip V-shape grooves and deep snow notches help enhance snow traction and performance Special tread compound helps adhere to wet and icy surfaces Dunlop® Self-Supporting Technology (DSST)® uses a patented sidewall construction to allow continued driving on a flat tire for up to 50 miles at 50 mph in normal conditions***