What does a temperature grade of 'C' indicate?

A temperature grade of 'C' on a tire indicates that the tire has the least resistance to heat among the grading categories. Tire temperature grades are part of the performance classification system that assesses how well a tire can withstand heat generated during operation, which is crucial for safety and longevity.

The grading system generally includes three levels: A, B, and C. An 'A' grade signifies a tire that can handle a higher temperature and provides better performance in terms of heat dissipation, reducing the risk of tire failure. A 'B' grade offers moderate resistance, meaning it has acceptable capabilities but not at the same level as an 'A' grade. When a tire is graded 'C', it suggests that it is on the lower end of the scale for heat resistance, which can lead to increased wear and decreased performance, especially under high-speed or heavy-load conditions.

A tire with a 'C' temperature grade must be used with caution, as operating conditions that generate significant heat could potentially compromise its performance and safety. Understanding these grades is essential for selecting the right tire for specific driving conditions and ensuring optimal tire performance.