ID # 14251771

2019 Polaris® 800 RMK Assault 155

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Prove Yourself Above the Tree Line

The RMK® Assault® 155 is a backcountry mountain snowmobile built for extreme conditions. The tough-as-nails sled, featuring Walker Evans® shocks, is perfect for dominating cliffs and jumps.

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.

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.

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.

Walker Evans® 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.

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.

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.

Rider Balanced® Control

The AXYS® RMK® 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.


800 RMK Assault 155
Sale Type
Engine Size
795 cc
Disc Brake Type
Drive System Type
Single, 3 Stage VES w/ Smart Actuator
Fuel System
Cleanfire® Injection
Clean-Fire 3D
Bore X Stroke
85 mm x 70 mm
Fuel Capacity L
11.5 gal (43.5 L)
Person Capacity
Overall Length
131 in (332.75 cm)
Overall Height
49.1 in (124.7 cm)
Overall Width
46.5 in (118.1 cm)