2019 Polaris PRO RMK 163 850cc 3.0 LIGHTEST. STRONGEST. MOST FLICKABLE The SnowCheck-exclusive 850 PRO-RMK 163 powered by the all-new Polaris 850 Patriot engine is part of the lightest, strongest, most flickable deep snow family on the market.The world's best mountain sled features the lightweight AXYS chassis which delivers the industry's best power-to-weight ratio, giving the rider instantaneous lift and immediate response. Features May Include: Patented Raised AXYS RMK Chassis - The AXYS RMK features a patented, raised chassis that increases clearance and reduces drag to keep you on top of the snow. The AXYS RMK chassis, purpose built for mountain riding, allows for improved sidehilling, faster and easier climbing, and instantaneous lift allowing the sled to pop onto the snow faster. The aluminum overstructure is lightweight and durable for all types of riding. Taller spindles increases clearance to reduce drag. Rear Suspension - The lightweight, rigid rear suspension design features revised geometry to control pitch. This improves weight transfer, delivering better control and a more compliant ride. The rigid suspension delivers power directly to the snow. NEW for MY19 The AXYS RMK Rear Suspension, on select models, features new lightweight technology and components, including an all new front track shock cross shaft which is 0.5 pounds lighter and all new, patent-pending hyfax design optimized for lighter weight while maintaining durability. Available for MY19 only on 850 PRO-RMKs. All-New Polaris 850 Patriot Engine - The most powerful Polaris snowmobile engine ever. - Building on 25 years of legendary Liberty engine heritage. - Creates an all-new benchmark for durability, acceleration, and response. - Industry-leading power-to-weight ratio and unmatched throttle response QuickDrive Low Inertia Drive System - The QuickDrive Low Inertia System is designed to make the sled rev quicker for instantaneous lift and reduces rotational inertia by 21% for easier handling and flickability.Not simply a belt-drive, it is a complete lightweight drive system featuring an extruded drive shaft, lightweight brake, RMK-specific brake caliper and of course the most visible piece of the system a maintenance-free belt drive that requires no oil or tensioner system. The complete system reduces rotational inertia by 21% which means 5lb. less effort when carving. RIDER BALANCED CONTROL Legendary RMK Balance - The patented AXYS chassis delivers the RMKs renowned perfect balance that riders have come to expect. The AXYS RMK offers increased, ultimate control and a more compliant ride. AXYS Body Panel Design - The AXYS RMK features a compact body panel geometry and design that helps give the sled the best lean angle in the industry allowing it to hold even the steepest sidehill lines. RMK does not Panel Out like other competitors.