What does the temperature grade of a tire represent?

The temperature grade of a tire is an important aspect of its performance specifications, specifically indicating the tire's resistance to heat buildup and its ability to dissipate heat effectively. This grade is a measurement of how well a tire can withstand the heat generated by the friction that occurs as the tire rolls on the road.

Higher temperatures can lead to tire degradation and failure, so a tire with a high temperature grade demonstrates that it can handle higher speeds and heavier loads without risking overheating. This is crucial for safety, as overheating can lead to tread separation and blowouts. A tire's performance under high heat conditions is particularly important for vehicles used in racing or for heavy-duty applications.

In contrast, the other options refer to different aspects of tire performance: the ability to handle extreme cold and performance on icy roads pertains to winter tires and their traction properties, while comfort level refers more to the tire's design and construction, impacting ride smoothness rather than heat resistance. Therefore, the temperature grade specifically measures heat resistance, making it a critical factor in tire safety and longevity.