The Discoverer True North is Cooper's Studless Ice & Snow winter / snow tire developed for the drivers of coupes, sedans, crossovers and SUVs. Designed to provide exceptional traction in snowy, slushy and icy conditions along with responsive steering and confident handling, the Discoverer True North meets the tire industry's severe snow service rating and earns the three-peak mountain snowflake (3PMSF) symbol.The specialized, winter-focused compound of the Discoverer True North boasts the highest silica content of any Cooper winter tire. Wide tread blocks in the outboard shoulder improve lateral grip for dry handling traction, while the higher void ratio of the middle of the tread and inboard shoulder aids wet performance. The circumferential center groove and wide lateral notches evacuate water and slush to improve hydroplaning resistance, and the specialized winter compound combined with the high sipe density provides traction on wet surfaces, in light or deep snow and on ice.The internal construction of the Discoverer True North consists of a two-ply polyester casing that helps balance the relationship between durability and ride comfort. Two wide, steel belts support the tread area, and a single-ply, nylon reinforcement aids handling response and provides high-speed capability.Due to the traction capabilities of the Discoverer True North, Cooper Tire recommends using Discoverer True North 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)?