Skip to content Skip to navigation Skip to footer

RMK® Assault® 155 Features

Instantaneous Lift

The combination of the raised and lightweight AXYS® chassis, a powerful Polaris® engine, and the Polaris-exclusive track designs pop the RMK® on top of the snow. 

Feature title
AXYS® Chassis
The raised AXYS® chassis increases clearance and reduces drag to keep you on top of the snow. It is purpose-built for mountain riding and allows for improved sidehilling, faster and easier climbing, and instantaneous lift allowing the sled to pop onto the snow faster. The aluminum over structure is lightweight and durable for all types of riding. Taller spindles increase clearance to reduce drag. 
Multiple Track Options

RMK® Assault® riders have a choice between the Peak 2.25" track and the Series 6 2.6" track. The Polaris®-exclusive Peak 2.25" track is ideal for mixed hard pack and deep snow conditions providing impressive traction and control. The single-ply design features a stiffer lug base with flexible tips to provide a hybrid of speed and flotation. The Polaris®-exclusive Series 6 2.6" track provides the ultimate mountain performance, and the lightweight track is designed for improved snow and hard pack traction and better lift. 

800 H.O. Cleanfire® Engine

Developed in conjunction with the AXYS® platform, the proven 800 H.O. Cleanfire® engine delivers class-leading acceleration. The integrated mounting position optimizes the balance of the chassis. 

Feature title
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. Off-trail, riders will notice improved weight transfer while maintaining the approach angle. On-trail, riders will notice a more compliant and comfortable ride. The rear suspension features a rail design that helps lift the rear skid while driving it forward. 

Chaincase Drive System

The RMK® Assault® uses the tried and true Polaris® chaincase drive system to deliver the perfect combination of strength and performance for cornice drops, jumps, and attacking the terrain. 

Walker Evans® Needle Shocks

Walker Evans® Needle Shocks with compression adjusters and remote reservoirs offer the best in tunability and fade-proof performance. Unique needle design uses hydraulic force at the end of the stroke to eliminate harsh bottoming.

Rider Balanced Control

The AXYS® RMK® features Rider Balanced® positioning that delivers ultimate control for the rider for precise, effortless sidehilling. 


The RMK® Assault® features the AXYS® Assault® Adjustable front suspension to provide riders adjustability and performance for extreme backcountry mountain conditions. 


Wide and adjustable, the RMK® Assault® can be dialed for your exact needs.


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. 

PowderTrac® Running Boards

The 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. There is now additional open space at the back of the boards by the rear pad to reduce snow build up. 


Polaris® snowmobiles are the lightest sleds on the mountain. They have always been light and rigid with added strength and durability while reducing weight on the RMK® AXYS® platform. Providing riders with instantaneous lift, Polaris sleds help riders get up on top of the snow faster. 

Additional Features
Feature title
PRO-Lite Seat

Mountain snowmobiling requires a different seat design and that is what Polaris® delivers. The seat is shorter to allow you to easily swing a leg and hop 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. 

Feature title
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. 


Lightweight RMK® brakes feature a fixed 2 piston opposed caliper design for an improved and quicker braking response anf feel. The brake pad material features higher thermal properties to provide more optimal wear over time. 

Integrated Storage Options

Optional accessory storage was designed and developed right along with the AXYS® platform so it installs securely and features seamless, integrated styling that matches the sled's design lines. Engineered with the highest quality of materials.