The Sportnex CR-S is a high-performance tire designed by Nankang for drivers who enjoy track days, motorsports, or want superior dry traction and handling. It is specifically engineered for warm and dry to slightly wet conditions. However, it is not suitable for use in freezing temperatures, snowy or icy roads. Nankang has developed the Sportnex CR-S with performance as the main focus. It features a specially formulated tread compound that quickly reaches its optimal operating temperature, making it ideal for track use. The tread design is asymmetric and includes wide outer tread elements that provide maximum lateral grip with minimal void. To assist in aggressive driving, an intermediate circumferential groove helps to dissipate heat, while two inner grooves evacuate water, reducing the risk of hydroplaning. The internal structure of the Nankang Sportnex CR-S consists of a polyester casing with a two-ply construction, enhancing its stability and handling capabilities. The tread area is supported by two wide steel belts, reinforced by a strong Aramid cap ply. This construction further enhances the tire's handling and allows for high-speed driving. The sidewall compound of the Sportnex CR-S aids in heat management and provides stiffness, resulting in a responsive and predictable driving experience. It is worth mentioning that Extreme Performance Summer tires like the Sportnex CR-S should not be exposed to temperatures at or below 20 degrees F (-7 degrees C). If the tires have been exposed to such low temperatures, they must be gradually returned to temperatures above 40 degrees F (5 degrees C) for at least 24 hours before any flexing, such as adjusting inflation pressures or mounting them on wheels. Failure to do so can cause irreversible cracking of the tire compound, which is not covered under warranty. If the tire shows signs of compound cracking, it should be replaced. Additional information related to tire maintenance and usage for competitive purposes is available, including shaving tires for autocross or track use, maintaining proper competition tire air pressure, and storing track and competition DOT tires in cold temperatures.

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