The WinterContact TS 860 S is Continental's Performance Winter / Snow tire developed for drivers of sports cars, sporty coupes and performance sedans and homologated for use on the Porsche 911 and Taycan in the North American market. The WinterContact TS 860 S is designed to provide the handling and confident control demanded by high-performance vehicles in cold dry and wet conditions, in addition to in snow and on ice.The tread compound of the WinterContact TS 860 S utilizes Continental's Cool Chili technology and is molded into an asymetric tread pattern. The compound's Flexible Polymer Matrix improves adhesion between the tire and the road for enhanced traction in all wintry conditions, and high performance resins help retain flexibility in winter temperatures. The 3D groove structure of the tire places grooves on the walls of the tread blocks, strengthening the interlock between the tire and packed snow in the grooves, thereby improving snow-to-snow traction, especially while turning. Specially designed sipe channels in the tread wick water vertically into the sipes, where it is then drained into larger grooves. This allows the WinterContact TS 860 S to remove the thin film of water that develops when friction melts ice or hard-packed snow at the tire contact patch, improving traction and reducing braking distances.WinterContact TS 860 S winter / snow tires meet the industry's severe snow service requirements and are branded with the three-peak mountain snowflake (3PMSF) symbol.Install Continental WinterContact TS 860 S tires in sets of four only. Related Information: What is the three-peak mountain snowflake symbol (3PMSF)?