Continental 0100145 Grand Prix Attack/Force Combo TPS-700 x 22/24 Black Tire with Black Chili is for hardcore racers. Front and rear tires have different tasks. Steering and braking forces are transmitted on the front, while the rear transmits the driving forces and bears the majority of the cyclist"s weight. Subsequently, the two tires in the Continental tire positioning system (TPS) have been designed differently. Both tires are made with Vectran puncture protection and show wear and tear levels via indicators in the tread, details that show professionals are at work. Both tires are equipped with Black Chili Compound, which is a rubber filler material that provides 30 percent more adhesion to the road, 26 percent lower rolling resistance and five percent improved mileage. Specs: Color - black with black skin foldable; Black Chili - yes; Weight - 400 grams; Recommended PSI - 110; Maximum PSI - 120; PU - 5.