2025 Arctic Cat M 858 ALPHA ONE SNO PRO

Overview

M ALPHA ONE

Re-Inventing Mountain Riding

Mountain riding just got a lot more interesting. The Arctic Cat M ALPHA ONE will revolutionize how you explore the backcountry with the groundbreaking CATALYST platform.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO M 858 ALPHA ONE SNO PRO

  • All New 858 C-TEC2™ Engine
  • AC5S Shocks
  • Power Claw™ Track
  • Sport Gauge
Specifications
Model
M 858 ALPHA ONE SNO PRO
Category Name
Snowmobiles
Year
2025
Sale Type
New
Manufacturer
Arctic Cat
engine
Cooling
Liquid
Exhaust
APV IV w/ Full Stainless Steel Exhaust & EGT Sensors
Ignition
Digitally Controlled CDI
Cylinders
2
Engine_Type
858, 2-Stroke
Lubrication
Electronic Injection
Displacement
858cc
Bore_x_Stroke
85 x 75.6 mm
Fuel_Capacity
10.4 gal
Fuel_Delivery
Next Gen. C-TEC2
Minimum_Octane
91
Oil_System_Capacity
3.0 qt
Engine_Stator_Output
270W @ 3000 RPM
Coolant_System_Capacity
4.2 qt
powertrain
Brakes
Stealth Hydraulic Master Cylinder
Gearing
24/63
Reverse
Push-Button Engine
Chain_Pitch
Belt
Drive_Clutch
ADAPT
Drive_System
AC M Belt Drive
Driven_Clutch
ADAPT
Clutch_Calibration
6,000-8,000 ft
Track_Drive_Sprocket
9 Tooth, 2.86 Pitch, Exvolute or 7 Tooth, 3.50 Pitch, Exvolute
suspension
Ski_Shocks
AC5S
Rear_Travel
13.5 in, 14.5 in, or 15.5 in
Front_Travel
7.6 in
Rear_Suspension
ALPHA ONE Rear Suspension
Front_Suspension
AWS 36
Rear_Track_Shock
AC5S
Front_Track_Shock
AC5S
dimension
Lug
2.60 in or 3.00 in
Pitch
2.86 in or 3.50 in
Ski_Stance
35-37 in - Adjustable
Track_Type
PowerClaw
Runner_Type
Single Runner w/ Carbide
Track_Width
15 in
Track_Length
146 in, 154 in, or 165 in
Ski_Type/Width
G2 ProClimb - 7 in
Overall_Chassis_Width
42-44 in
Overall_Chassis_Height
50 in
Overall_Chassis_Length
126.5 in or 131 in
instrumentation
Oil
LCD Icon
Fuel
Digital
Hours
Digital
Coolant
Digital Bar Graph
Odometer
Digital
Tachometer
Digital
Speedometer
Digital
Type_of_Gauge
Sport
features
Color
Medium Green/Black
Seating
Mountain
Starter
Manual or Push-Button Electric Start
Lighting
LED
Handlebars
Hooked w/ Grab Handle
Heat_Exchanger
Front/Short Tunnel
Standard_Accessories
12V Outlet, Sport Front Bumper, Integrated Goggle Holder, ATACH Rear Storage, Hand & Thumb Warmers, Ice Scratchers, Standard Brake Disc, Vertical Steering, Tether Switch, Visor Plug-Ins
main features

2025 Arctic Cat M 858 ALPHA ONE SNO PRO UNMATCHED CONTROL

ALPHA ONE Single-Beam Rear Suspension

Arctic Cat’s revolutionary single-beam rear suspension changes the game for mountain snowmobiles. The unique monorail design sheds snow to keep your sled light and equalizes floatation across the width of the track. ALPHA ONE offers unmatched maneuverability and flotation - allowing you effortlessly go where others are left stuck and tired.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

PEAK PERFORMANCE UNLOCKED

CATALYST Chassis

The revolutionary CATALYST platform has been built from the ground up to optimize every aspect of your ride, so much so that you’ll feel at one with the sled. With enhanced ergonomics, a lower center of gravity, our exclusive laydown engine design, specially calibrated suspension and more, this changes everything.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

OPTIMIZED FOR DEEP SNOW

AWS 36 Front Suspension

The AWS 36 Front Suspension was designed specifically with the M 600 in mind. With lightweight spindles and precision engineered geometry, this suspension system optimizes your performance in deep snow.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

A NEW BREED OF POWER

ALL NEW 858 ENGINE

The all-new 858 two-stroke engine is designed for seamless integration into the new CATALYST platform. With an 8% increase in displacement, this engine houses an 11% increase in output over the C-TEC2 800 and weighs 4% less. It features an optimized air intake system, a new exhaust valve design for more consistent power and cleaner emissions, and an all-new crankcase for increased stroke and integrated engine mounts.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

SMOOTH POWER DELIVERY

ADAPT CVT SYSTEM

With its lightweight, narrow design that increases performance and belt life, as well as the industry’s only self-adjusting clutch, the ADAPT™ CVT system provides better throttle response, smoother power delivery and a ride like no other.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

UNPRECEDENTED TRACTION

PowerClaw Track

Unlock the backcountry with Power Claw™, a lightweight track that delivers the ultimate deep snow traction and performance. The staggered, forward curving paddle tower design won’t fold over, allowing you to float over the deepest snow. Available in 146-in, 154-in and 165-in with 2.6-in or 3.0-in lugs.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

INCREASED DURABILITY

ARCTIC CAT MOUNTAIN BELT DRIVE

The CATALYST platform utilizes Arctic Cat's belt drive system rather than a chain drive. This allows for enhanced durability and fewer parts in the system. The adjustable center distance allows for multiple ratio options and makes servicing simple. Additionally, the track included with the AC Mountain Belt Drive ensures that the sled gets up on the snow quicker, avoiding trenching issues.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

ULTIMATE ADJUSTABILITY

AC5S SHOCKS

Designed by Arctic Cat, for Arctic Cat, the all new AC5S shocks offer 5 different positions and adjustable spring preload. They are uniquely calibrated for backcountry riding and showcase both Arctic Cat's legacy of durability and its signature style.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

BRIGHTEN ANY RIDE

Asymmetrical LED Headlight

A premium LED headlight is crucial to optimize your visibility. Equipped with both high and low-beams, this headlight casts an LED light pattern with great range and width. Plus, with it's unique asymmetrical design, everyone will know that you're on an Arctic Cat.

2025 Arctic Cat M 858 ALPHA ONE SNO PRO

QUICKLY CONNECT

ATACH LATCHING SYSTEM

Adding accessories to your sled is a snap with this 4-point latching system. You can install and remove accessories in seconds, so no matter where you are, you can customize your sled with ease.

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