After over 10 years of time from the introduction of the benchmark of racing tires, the GRAND PRIX 4000, this is a full model change with improved performance. In addition to the "Black Chili Compound" which was updated for the "GRAND PRIX 5000", we also use "Laser Grip", "Active Comfort", and "Vector Tranbreaker. 12% improved rolling resistance compared to the GP4000SII 20% more puncture resistance, and a lighter 0.2 oz (5 g) (compared to the same size). The benchmark of clincher racing tires has evolved in all directions. ETRTO: 25-622 Weight: 245 Recommended Air Pressure (PSI): 95-116 TPI: 3/330 Features: Black Chili Pound: The carbon particles used in black chili compound are approximately 1/10 of the size of the carbon particles used in regular tire rubber. These nano-carbon particles maximizes the flexibility of the rubber and can be instantly transformed into the shape of the object that is touched by pressure when the tire is pressed onto the road to create a high grip performance. In addition, it can instantly return to its original shape and adapt to the next road change. Thanks to the benefits of rubber with these exceptional properties, the friction resistance occurs between the road surfaces is significantly reduced and the rubber has a high grip performance even though it is difficult to loose. Laser Grip: Laser irradiated on the tread surface to cut fine grooves on the tire surface and strengthen the side grip. By placing it only on the sides, it reduces road resistance and ensures consistent corner ring performance. Active Comfort Technology: Weve revised the construction of the casing for a more supple ride and lighter ride. It is an innovative approach to cycling by providing excellent vibration absorption while riding, reducing fatigue during riding. Vectranbreaker Vectran is a high-tech chemical fiber that is also used in liquid crystal polymers and Kevlar is used for bulletproof vests. It is harder and has a tensile strength of about 5 times higher than iron. Compared to nylon puncture breakers, this textile is lightweight and flexible, and has excellent tear resistance and Continental uses high performance tires for road use. ◆Made in Germany; Product images are for reference only, actual product may differ in color and design. The color you see may differ from the actual product due to monitor settings and light conditions. In addition, please be aware that depending on the manufacturers circumstances, the specifications and weight of the product may change due to production process and improvements.