The Blizzak WS90 is Bridgestone's Studless Ice & Snow winter tire developed for drivers of sedans, coupes, minivans and crossovers looking for confident control in a variety of difficult winter weather. When winter driving conditions are at their worst, Bridgestone's Blizzak WS90 winter tires are designed to be at their best.The symmetric pattern of the Blizzak WS90 features increased block stiffness to deliver more responsive steering in addition to improved wear life, and Bridgestone's EdgePerformance Technology Package includes full-depth features and interlocking sipes to provide impressive performance longer through the tire's life. The tread pattern features greater contact area and 15% more block edges than the Blizzak WS90's predecessor, increasing ice traction and reducing braking distances in slippery conditions. It is molded from Bridgestone's next generation Multi-Cell compound with bite particles, which allows the tire to remove the thin layer of water that develops between the tread rubber and icy surfaces, enabling the tire to better grip the ice. Silica enhancements in the compound further improve grip in snow and on ice.Blizzak WS90 Studless Ice & Snow tires meet the industry's severe snow service requirements and are branded with the three-peak mountain snowflake (3PMSF) symbol.Blizzak WS90 tires feature snow platforms that act as winter wear bars and notify drivers when they are near the end of the Multi-Cell compound (actual depth of Multi-Cell compound varies slightly by tire size). Beneath the Multi-Cell compound is Bridgestone's best winter compound, but without the Multi-Cell feature.Install Bridgestone Blizzak WS90 tires in sets of four only.Due to the traction capabilities of Blizzak WS90 tires, Bridgestone recommends using them only in sets of four to provide the best handling characteristics and tire performance. Related Information: What is the three-peak mountain snowflake symbol (3PMSF)?