Ribbed ski provided with a support

A ski comprising:

• a lower sliding surface;
• two laterally opposed side portions;
• two lower edges connecting the lower sliding surface and the two laterally opposed side portions;
• an upper portion including:
• a median rib extending longitudinally at least in a central longitudinal section of the ski;
• and
• two laterally opposed lower portions, the median rib extending upwardly from said lower portions;
• a support supported by both of said two laterally opposed lower portions, said support comprising means for supporting ski bindings and having an inverted U-shape including an upper wall and two lateral walls connected to and extending downwardly from said upper wall of said support, each of said two lateral walls of said support being supported by a respective one of said two laterally opposed lower portions of said upper portion of the ski, said support defining a housing for said median rib, and at least one of said two lateral walls of said support comprising at least one longitudinally extending recess forming a slot therethrough between forward and rearward end portions of said at least one wall, said forward and rearward end portions having lower edges, at least portions of said lower edges remain in contact with said lower portions, wherein an intermediate portion of said upper wall, between said frontward and rearward end portions of said at least one wall, is capable of deflecting downwardly towards a top surface of said median rib when a downwardly directed force is placed upon said upper wall.