The Sportnex CR-S is an Extreme Performance Summer tire developed by Nankang. It is specifically designed for track day participants, motorsports enthusiasts, or drivers seeking high levels of dry traction and handling. This tire is not suitable for use in cold temperatures, snow, or icy conditions. Nankang has prioritized performance in the design of the Sportnex CR-S. The tire features a new tread compound that reaches its optimal operating temperature quickly. The asymmetric tread pattern is built for speed, with minimal void for maximum lateral grip. The presence of an intermediate circumferential groove helps dissipate heat during aggressive driving and assists in water evacuation to prevent hydroplaning. Internally, the Sportnex CR-S is constructed with a two-ply polyester casing for improved handling and stability. The tread area is supported by two wide steel belts, reinforced by a sturdy Aramid cap ply. The sidewall compound is designed to manage heat while enhancing stiffness, providing drivers with a reactive and predictable driving experience. Please note that if the temperature falls below 20 degrees F (-7 degrees C), tires must be gradually brought back to a temperature of at least 40 degrees F (5 degrees C) for a minimum of 24 hours before any flexing occurs. Cold-weather use can cause irreversible compound cracking, which is not covered under warranty. If compound cracking occurs, the tires must be replaced. Additional related information includes details on shaving tires for autocross, track use, and competition, advice on competition tire air pressure, and guidelines for storing track and competition DOT tires in cold temperatures.