The Accelera X-Grip Snow tire is designed for the roughest winter conditions. The X-Grip Snow features a directional tread pattern with sweeping grooves and cross grooves for winter traction, higher density of sipes toward the shoulder, and a continuous center rib for self-cleaning of snow and slush. The X-Grip Snow can be pinned with studs for extremely slippery or icy conditions. NOTE: adding studs to tires is not legal in all states and is restricted to certain months in others. Check your state laws.