🛞 Nokian Tyres builds tires with temperature-activated retractable studs

Nokian Tyres introduced Hakkapeliitta 01, a tire with studs that extend in cold conditions and retract when temperatures rise.

The mechanism relies on a special rubber compound. An inner layer changes stiffness depending on temperature, which pushes the studs outward in frost and pulls them back in warmer weather.

The design adapts traction to changing road conditions automatically.

📊 @tech