Ski with three-dimensional running surface

摘要

A three-dimensional ski base and skis having the ski base secured thereto as a running surface, the ski base comprising a plurality of scale-like protuberances inclined with respect to the bottom plane of the running surface of the ski and which rise toward the rear end of the ski, the surfaces of the protuberances convexly curved both in a longitudinal and in a transverse direction of the running surface to provide a resistance to backward movement and improved sliding properties in forward movement.