Toyo Tire Observe GSi-5 is a high-quality winter tire for passenger cars, light trucks, and SUVs. It consists of Toyo's patented Microbit Technology with crushed walnut shells in the tread compound that provide an exceptional grip on ice and snow. With high-silica levels in the compound, Observe GSi-5 promotes better block flexibility at lower temperature levels and improves wet surface traction. Its cutting-edge spider sipe technology provides grip on the surface during acceleration, braking or cornering. Observe GSi-5?s Three-Peak Mountain Snowflake Logo guarantees reliable winter traction.