[JSpira]

Given the recent blizzards in the eastern U.S., this is very relevant today:

Driving a car with high-performance summer tires is great – until the temperatures start to dip.

Summer tires are standard equipment on many high-performance cars such as those from Audi, BMW, Mercedes-Benz, Porsche, and other manufacturers, and the tires are designed to provide optimum dry-conditions performance and good handling in wet conditions.


There is, however, a catch. At 7° C (45° F), their compound loses adhesion and, as a result, they cannot be used safely under wintry driving conditions.

Continues here with many photos.