Snowboard with dual-acting, interchangeable edges

A snowboard comprising:

• a curved up nose, a top, a flat bottom, a tail, and two curved up, sawtooth shaped side surfaces, each said side surface cross-section perpendicular to the length axis of said bottom forming a curved up, sawtooth shape extending essentially the full length of the snowboard, the first of said sawtooth surfaces extending from the edge of said bottom and pointing out and up at a shallow angle from the plane of said bottom, a second sawtooth surface extending from the outside edge of said first sawtooth surface and pointing out and down at a shallow angle toward the plane of said bottom surface, said second sawtooth surface terminating at an elevation slightly above that of said bottom surface, a third sawtooth surface extending from the outside edge of said second sawtooth surface and pointing out and up at an angle to said bottom surface which is larger than that formed by said first sawtooth surface to said bottom surface, said third sawtooth surface terminating at an elevation well above that of said bottom surface, a fourth sawtooth surface extending from the outside edge of said third sawtooth surface and pointing essentially straight out and parallel to said bottom surface, said fourth sawtooth surface being elevated well above said bottom surface, a fifth and final surface pointing essentially straight up and connecting said curved up, sawtooth shaped side construction to said top of said snowboard.