STUDLESS WINTER TIRE With advanced 3D interlocking and multiwave siping, and a silica-infused compound the NT90W is engineered for severe winter driving conditions. It is a studless winter tire sized for crossover vehicles, SUVs and passenger cars and made with a unique blend of natural materials that improve winter traction. Crushed walnut shells bite into ice and snow while bamboo charcoal helps absorb water off the road surface. Nitto's NT90W helps you stay connected with the road, even in adverse weather conditions of ice and snow.