With the HTR4, Sumitomo achieves the dream of every tiremaker, to create a genuine high performance tire that keeps its handling balance in dry, wet, or snowy conditions. Using their advanced tire technologies, Sumitomo developed a new tread compound that controls the hardness of the tire at all temperatures encountered on the road. The result is that the tire will remain pliable enough at low temps to grip the road, and for the triangular tread blocks to dig into the snow.
Be safe … get good tires.