For improved acceleration, the Maxxis 4-Snow expands up to 40% during use. It features a reversible tread design for optimum traction on snow and ice. The soft compound remains flexible in cold weather for better grip. Tire diameter expands up to 40% during acceleration for additional traction and ground clearance; reduces the need for shifting. Reversible tread design offers optimum traction: Use the scoop side for snow and back side for increased surface contact on ice. Special soft compound stays flexible in cold weather for amazing grip and a smooth ride. Drag racers first tire choice on ice, snow and pure sand.