Continental 0118439 Grand Prix Supersonic-700 x 23 Black Tire with Black Chili is faster than the speed of sound! With the Grand Prix Supersonic, your contact with the road can be tuned to minimum weight and minimum rolling resistance. Together with a “Race 28 Supersonic” inner tube, our quickest tire weighs only 210 grams. The slick rolling area made out of a carbon black mixture looks cool and is of course made using our Black Chili recipe. But be cautious, the Grand Prix Supersonic is a very apt weapon in fighting for a personal best time. Although, for this extra speed, the tire does not feature any additional puncture protection and has limited mileage use. With this in mind, the Grand Prix Supersonic is not a tire for training! Specs: Color - black/black skinwall foldable; Black Chili - yes; Weight - 160 grams; Recommended PSI - 115; Maximum PSI - 145; PU - 10.