Instantaneous Lift The combination of the raised and lightweight AXYS platform, a powerful Polaris engine, and the Polaris-exclusive track designs pop the PRO RMK 163 on top of the snow. Rider Balanced Control The AXYS platform features Rider Balanced positioning that delivers ultimate control for the rider for precise, effortless sidehilling. Immediate Response The world's best mountain sled is built to be the lightest and most rigid, making it incredibly responsive to rider inputs. This allows you to change direction and maneuver confidently in all conditions.