No Limits Snowmobile Skis - Extreme Powder and Mountain Trail Riding. MOUNTAIN EXTREME snowmobile skis are designed for top performance in deep powder conditions that demand maximum flotation and agile steering. Wider than all of C&A’s other skis, the additional width provides an extended surface to provide the front end lift needed in powder to reduce drag on components under the sled. The skis feature rounded outer ribs and a contoured center keel for easy maneuverability when mountain trail riding.