The Ultra Grip 8 Performance is Goodyear's Performance Winter / Snow tire developed for the drivers of high-performance sport coupes, sedans and crossovers who want traction on winter's dry, wet and snow-covered roads. Ultra Grip 8 Performance winter tires are designed to combine good snow and ice traction with high-speed winter driving performance.Ultra Grip 8 Performance winter tires feature an optimized polymer blend and silica tread compound molded into a directional tread pattern. The winter tread compound is designed to remain flexible and provide consistent grip in low temperatures to combine winter traction in snow with hydroplaning resistance on wet and slush-covered roads. The Ultra Grip 8 Performance's rounded shoulders enhance dry and wet handling while the saw-shaped center rib helps grip snow-covered roads and provides constant road contact for highway stability. The high sipe density tread provides the biting edges needed to help grip hard-packed snow and ice for winter traction without resorting to traditional metal studs.Ultra Grip 8 Performance winter / snow tires meet the industry's severe snow service requirements and are branded with the three-peak mountain snowflake (3PMSF) symbol.Ultra Grip 8 Performance tires feature winter wear indicators to identify when the remaining tread depth is insufficient to provide beneficial snow performance.Install Ultra Grip 8 Performance tires in sets of four only.Due to the traction capabilities of the Ultra Grip 8 Performance, Goodyear recommends using Ultra Grip 8 Performance tires 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)?