Winter tires are specially developed tires that are optimized for use in wintry weather conditions such as snow, ice and cold. They offer improved traction, control and safety compared to summer or all-season tires. The main features of winter tires are their special rubber compound, tread design and tread depth.

1. Rubber compound: Winter tires are made of a softer rubber compound that remains flexible at low temperatures. This improves grip on wet, icy or snow-covered roads. The rubber compound usually also contains silica, which reduces rolling resistance and optimizes fuel consumption.
2. Tread design: The tread of winter tires has a more aggressive tread pattern specifically designed for use on snow and ice. The tread has additional sipes and grooves that better evacuate snow and water to minimize the risk of aquaplaning.
3. Tread depth: Winter tires have a deeper tread depth than summer tires to ensure optimal traction on snow and ice. The extra tread depth also helps drain water and mud from the tire surface.

Snow tires come in a variety of sizes and types to suit different vehicles and driving conditions. In many countries there is a legal obligation to use winter tires in winter or in wintry weather conditions. It is recommended to change all four tires at the same time to ensure smooth handling and optimal safety.