The iceGUARD iG20 is Yokohama's Studless Ice & Snow winter tire developed for the drivers of sports cars, coupes and sedans. Featuring Yokohama's winter traction technologies, iceGUARD iG20 tires offer enhanced grip on winter's slushy, snow-covered and icy roads.Yokohama iceGUARD iG20 tires feature a Shelled Microbubble Compound that contains semi-rigid, resin-coated voids throughout the contact area to reduce slippage in slush, snow and on ice by extracting road moisture often encountered in near-freezing ambient temperatures. This compound is molded into a symmetric tread design featuring independent shoulder and intermediate tread blocks flanking an extended block center rib to enhance braking, straight-line stability and noise comfort. Four wide circumferential grooves eject water and snow while lateral grooves channel slush from under the footprint. High-density 3-D zigzag sipes lock together to promote block rigidity in dry and wet conditions, as well as permit more biting edges to increase traction in snow and on ice.The tire's internal structure features twin steel belts on top of a polyester cord reinforced casing to blend durability with ride comfort.The iceGUARD iG20 Studless Ice & Snow tire meets the industry's severe snow service requirements and are branded with the three-peak mountain snowflake (3PMSF) symbol.Install Yokohama iceGUARD iG20 tires in sets of four only.Due to the traction capabilities of iceGUARD iG20 tires, Yokohama 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)?