Abstract: The new skis for converting a wheeled push vehicle into a slidable push vehicle have a front anchor on their upper surfaces at a location proximate to the toe end and a rear anchor on their upper surfaces at a location proximate to the heel end. A flexible front harness assembly is attached to the front anchor, and a flexible rear harness assembly is attached to the rear anchor. The distance between the front anchor and the rear anchor is such that any aligned fore and aft wheel assemblies of a wheeled push vehicle to which the ski is capable of being attached can be positioned on the upper surface of the ski between the front and rear anchors to permit the front and rear harness assemblies to draw the fore and aft wheel assemblies away from each other and in a downward direction on the ski. A simple strap can serve as a harness assembly.