Dunlop factory spec 19” rear tire • The Geomax Factory Spec tire features an optimized single-radius profile to provide the ultimate control characteristics for when the track conditions deteriorate and become rougher during the race. With thousands of hours of testing, Dunlop developed an optimized single radius profile for increased control. • Features a larger apex for improved responsiveness and increased support for higher speeds and harsher landings. • Dunlop's proprietary Ultra-High Molecular Mass compound features extended polymer chains that increase bonding points with the carbon molecules to deliver a rubber that is extremely strong allowing the knobs to penetrate the ground more effectively. The result is a knob that utilizes every millimeter of height to distribute acceleration forces for improved grip and performance.