The top competition tire with Dual Compound Technology. The “friction resistant” Endurance mixture in the center of the tread is hard wearing for longer life and low rolling resistance. The Silica mixture on the tread sides provides superb cornering stability. The RaceGuard puncture protection belt has been specially developed for racing tires - lightweight and with low rolling resistance, it provides really effective protection against punctures.
Every
Bicycle Tire, LLC "A Reference Resource & More.." 2009 
