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2026 Arctic Cat HCX 858 ES
2026 Arctic Cat HCX 858 ES

Specs

General Information

Manufacturer
Arctic Cat
Arctic Cat
Model Year
2026
2026
Model
HCX 858 ES
HCX 858 ES
Model Code
S2026CMJHXUSB
S2026CMJHXUSB
Color
Black / Quicksilver
Black / Quicksilver

Dimensions

Length
Overall chassis - 122 in.
Overall chassis - 122 in.
Height
Overall chassis - 50 in.
Overall chassis - 50 in.
Width
Overall chassis - 42 - 44 in.
Overall chassis - 42 - 44 in.

Engine & Drivetrain

Engine
858, 2-Stroke
858, 2-Stroke
Cylinders
2
2
Cooling

Liquid

Coolant system capacity - 5.4 qt.

Heat exchanger - Front / Short tunnel

Liquid

Coolant system capacity - 5.4 qt.

Heat exchanger - Front / Short tunnel

Displacement
858 cc
858 cc
Bore x Stroke
3.3 x 3 in. (85 x 75.6 mm)
3.3 x 3 in. (85 x 75.6 mm)
Fuel System
Fuel delivery - Next Gen. C-TEC2
Fuel delivery - Next Gen. C-TEC2
Starting
Push button electric
Push button electric
Ignition

Digitally controlled CDI

Engine stator output - 270W @ 3,000 rpm

Digitally controlled CDI

Engine stator output - 270W @ 3,000 rpm

Lubrication
Electronic injection
Electronic injection
Drive System
AC M Belt Drive
AC M Belt Drive
Drive Clutch
ADAPT
ADAPT
Driven Clutch
ADAPT
ADAPT
Drive Sprocket
9 Tooth, 2.86 Pitch, Exvolute
9 Tooth, 2.86 Pitch, Exvolute
Clutch Calibration
6,000 - 8,000 ft.
6,000 - 8,000 ft.
Reverse
Push-button electric
Push-button electric
Transmission

Gearing - 24 / 63

Chain pitch - Belt

Gearing - 24 / 63

Chain pitch - Belt

Exhaust
APV IV with full stainless steel and EGT sensors
APV IV with full stainless steel and EGT sensors
Brakes

Stealth 88 hydraulic master cylinder

Lightweight mountain disc

Stealth 88 hydraulic master cylinder

Lightweight mountain disc

Fuel Type
Minimum octane - 91
Minimum octane - 91
Fuel Capacity
10.4 gal.
10.4 gal.
Oil Capacity
3.0 qt.
3.0 qt.

Operational

Handlebar
Hooked with grab handle
Hooked with grab handle
Instrumentation

Type of gauge - Sport

Speedometer, tachometer, odometer, fuel and hours - Digital

Oil - LCD icon

Coolant - Digital bar graph

Type of gauge - Sport

Speedometer, tachometer, odometer, fuel and hours - Digital

Oil - LCD icon

Coolant - Digital bar graph

Seating or Rider capacity
Mountain
Mountain
Skis

Type - G2 ProClimb

Width - 7 in.

Type - G2 ProClimb

Width - 7 in.

Ski Stance
35 - 37 in. - adjustable
35 - 37 in. - adjustable
Carbide
Runner type - Single runner with carbide
Runner type - Single runner with carbide
Track Type
PowerClaw
PowerClaw
Track LxWxH
146 x 15 x 2.60 in.
146 x 15 x 2.60 in.
Pitch
2.86 in.
2.86 in.

Other

Includes
Standard accessories - 12V outlet, integrated goggle holder, ATACH mounting, hand and thumb warmers, ice scratchers, laydown steering, tether switch, visor plug-in
Standard accessories - 12V outlet, integrated goggle holder, ATACH mounting, hand and thumb warmers, ice scratchers, laydown steering, tether switch, visor plug-in
Safety Features

Lighting - LED

Sport front bumper

Lighting - LED

Sport front bumper

Suspension

Shocks

Ski / Front track - FOX FLOAT 3 QS3

Rear track - FOX FLOAT 3 QSL

Ski / Front track - FOX FLOAT 3 QS3

Rear track - FOX FLOAT 3 QSL

Front Suspension

AWS 36

Travel - 7.6 in.

AWS 36

Travel - 7.6 in.

Rear Suspension

FLOAT ACTION with 10 in. rear wheels and braced rails

Travel - 13.5 in.

FLOAT ACTION with 10 in. rear wheels and braced rails

Travel - 13.5 in.

Features

Features

  • A NEW BREED OF POWER - 858 ENGINE: The 858 two-stroke engine is designed for seamless integration into the 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, an exhaust valve design for more consistent power and cleaner emissions, and a crankcase for increased stroke and integrated engine mounts.
  • 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.
  • KEEP YOURSELF PLANTED - TWIN RAIL SUSPENSION: The twin rail braced suspension is built for one thing: carving and climbing with control. With two braced rails, it delivers a solid, predictable feel that keeps the track straight and the power locked in — even when the hill gets rutted, windblown or near vertical. Compared to single rail setups, it’s less flickable but more planted — perfect for riders who’d rather hold the line than play around it.
  • OPTIMIZED FOR DEEP SNOW - AWS 36 FRONT SUSPENSION: The AWS 36 Front Suspension was designed specifically with the 858 in mind. With lightweight spindles and precision engineered geometry, this suspension system optimizes your performance in deep snow.
  • 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.
  • 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.
  • 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.
  • UNPRECEDENTED TRACTION - POWER CLAW 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.
  • 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 its unique asymmetrical design, everyone will know that you're on an Arctic Cat.

Features

  • A NEW BREED OF POWER - 858 ENGINE: The 858 two-stroke engine is designed for seamless integration into the 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, an exhaust valve design for more consistent power and cleaner emissions, and a crankcase for increased stroke and integrated engine mounts.
  • 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.
  • KEEP YOURSELF PLANTED - TWIN RAIL SUSPENSION: The twin rail braced suspension is built for one thing: carving and climbing with control. With two braced rails, it delivers a solid, predictable feel that keeps the track straight and the power locked in — even when the hill gets rutted, windblown or near vertical. Compared to single rail setups, it’s less flickable but more planted — perfect for riders who’d rather hold the line than play around it.
  • OPTIMIZED FOR DEEP SNOW - AWS 36 FRONT SUSPENSION: The AWS 36 Front Suspension was designed specifically with the 858 in mind. With lightweight spindles and precision engineered geometry, this suspension system optimizes your performance in deep snow.
  • 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.
  • 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.
  • 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.
  • UNPRECEDENTED TRACTION - POWER CLAW 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.
  • 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 its unique asymmetrical design, everyone will know that you're on an Arctic Cat.