800 RMK Assault 155

The weapon of choice for backcountry freeriders and hillclimb racers is back and better for 2013.

What's New For 2013

  • PowderTrac™ Running Boards
  • Carbon Fiber Overstructure
  • Pro Lite Seat

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Real World Domination


  • CHASSIS: Pro-Ride Chassis with Carbon Fiber Overstructure
  • SUSPENSION: Competition-Spec, Front End, RMK Coil-Over, WALKER EVANS® Shocks
  • ERGOS/BALANCE: PowderTrac™ Running Boards, Pro-Lite Seat, ProTaper® Bars
  • POWERTRAIN: 800 Cleanfire® Engine

PowderTrac™ Running Boards

The new PowderTrac™ running boards have been developed for maximum snow clean out and maximum strength. Built from extruded aluminum with bonded cast lugs, they boast an open area of over 50% and integrated traction that is machined in for sure footed performance.

Pro-Lite Seat

Mountain snowmobiling has changed and so has its seat. The RMK features a new seat design. Shorter by 5.5" allowing you to easily swing a leg from one side to the other —along with a wider, flatter area for more comfortable seated riding.

Reduced Weight

We know that weight matters. We look at every component and work to make it lighter and stronger. Through our use of industry-leading materials and technology, we deliver on it.

Pro-Ride Chassis with Carbon Fiber Overstructure

The world's most advanced chassis - light, rigid and perfectly balanced.

800 Cleanfire® Engine

This liquid-cooled Cleanfire® engine with semi-direct injection (SDI) delivers outstanding throttle response and instant acceleration. These powerful, efficient engines produce the impressive power-to-weight ratios that deep snow riders demand. Cleanfire engines start easily and reliably and they calibrate automatically as the temperature and elevation change. These engines deliver impressive fuel economy in real-world riding situations, which, for Polaris riders, means aggressive, up-tempo riding, not low-rev lab conditions.


The low-profile LED tailight, lightweight punched snow flap with hand access and carbon fiber bumper with extruded billet mounts add style and function. New, narrower tunnel cooling extrusions save weight.


High-rise aluminum design and adjustable bar clamp create an optimum riding position that can be tailored to your riding style. Bar hooks and race-style master cylinder round out the purpose-built controls.


Prevents unauthorized driveaway of idling sled, and can be installed by dealer on sleds with Pro-Ride Gauge.


Wide and adjustable, this RMK can be dialed for your exact needs. Stiffer sprung and valved, compression adjustable WALKER EVANS® Piggyback shocks are matched to a swaybar-less design.


WALKER EVANS® 16-position Compression Adjustable Needle Shocks and heavy-duty springs are ideally suited for tearing up Jackson Hole moguls or dropping cliffs.


The silencer has been designed to keep noise levels and overall weight in check.


Reducing rotating mass allows for a sled with quicker response. Lightweight, purpose-built RMK brake system. Featuring the proven Cyclone master cylinder mated to a lightweight, single-piston caliper.


The heart of any mountain sled is the rear suspension. The RMK Coil-Over Rear Suspension is designed for better flotation and deep snow performance with improved on-trail ride. By eliminating the torsion springs and redesigning the torque arms, this skid weighs substantially less. In addition, it is tunable to the snow conditions. A simple turn of the spring preload adjustment allows you change your set-up from deep powder to crusted snow.


Stiff durometer construction is ideally suited for hillclimb and backcountry use. Pre-punched for quick snow cleanout.

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