2021 Polaris RMK Khaos 163 850 2.6 in Easiest to initiate side hills, handles the rough single track and big air jumps with ease. Playful and wheelies in the meadows. New suspension geometry and WER® Velocity Shocks let you conquer it all. Push Your Pulse Above the Treeline Unrivaled, effortless agility and instantaneous response on every inch of the mountain. Introducing QuickDrive2 (QD2) Exclusive to SnowCheck, the instant response of the new QuickDrive2 paired with the all-new Series 8 track delivers the lowest effort all mountain sled ever created. Features May Include: AXYS Platform - The raised AXYS platform increases clearance and reduces drag to keep you on top of the snow. It is purpose-built for mountain riding and allows for faster and easier climbing and instantaneous lift to pop onto the snow faster. The aluminum over structure is lightweight and durable for all types of riding. Patriot 850 Engine - Built to integrate seamlessly with the lightweight and agile Polaris chassis, Liberty engines feature class-leading power-to-weight ratios and set a new benchmark for ultimate performance with our complete line-up of powerful. PRO-RMK React Front Suspension - The PRO-RMK React Suspension provides riders with the most effortless ride in the deep snow. Experience less fatigue with the most predictable ride. It includes a 36-38 stance, a sway bar designed for predictable handling, and forged a-arms and spindles optimized for strength and durability. WER® Velocity Hi-Lo Shocks - The RMK KHAOS 163 comes with premium WER® Velocity Shocks for the best of the best in various mountain conditions. These have been proven in hillclimb dominance. New SnowCheck Exclusive QuickDrive2 (QD2) - Introducing the all-new, SnowCheck Exclusive, low-inertia QuickDrive2 (QD2). QuickDrive is the lightest drive system in the industry and produces the lowest inertia for maximum flickability. QD2 boasts a 10% gear reduction for even quicker response and track speed. The system has been optimized for both 2.75” and 3” track lug heights. New SnowCheck Exclusive Series 8 Track - The all-new, SnowCheck exclusive, lightweight Series 8 track features a 3.5” pitch and optimized 2.75” lug for less mass and reduced inertia resulting in quicker response, instantaneous lift and optimum flotation for the ultimate in all-mountain performance. PRO-Lite Seat - Mountain snowmobiling requires a different seat design and that is what Polaris delivers. The PRO-Lite seat is shorter to allow you to easily swing a leg over from one side of the snowmobile to the other. LED Lights - All models built on the AXYS platform feature standard LED headlights to deliver the industry's best lighting that is 80% brighter than incandescent lighting. MessageCenter Gauge - Informative and easy to read, this gauge keeps a rider aware of sled operating conditions and provides a wealth of additional data. Polaris Interactive Digital Display - This exclusive and industry-leading full color display provides important information and capabilities to the rider such as: sled performance, Bluetooth™, GPS mapping, Clock, and LH Control. This gauge comes as an option on some models and is also available as an accessory. Mountain Hoop - Re-designed in 2016, the mountain hoop is more ergonomic and has been moved down 2.5 to prevent hitting the rider in the chest when in steeper terrain. Now a once-piece, stylized design, the mountain hoop is made of durable polyurethane material. XT Hyfax - 850 Models - The profile design has been optimized for lighter weight while maintaining durability.