FOX Factory Series Ski 1.5 Zero QS LRW Adjustable Shock, Part Number 850-02-050

Completely redesigned and refined Factory Series Shocks are the lightest yet! Available in Coil and Float series with updated MY 26 styling. Rifle Bore have spiral grooves on the inside of the shock allowing oil to flow around the main piston reducing the damping force in the ride zone for a plush ride. The grooves end through the final 30% of the travel forcing the oil to flow through the main piston resulting in a significant increase in bottom-out resistance to cushion hard hit. QSE model rear track shocks include an electronic lock out mode with the simple click of a handlebar mounted button!

The FOX Factory Series Ski 1.5 Zero QS LRW Adjustable Shock is a redesigned and weight-optimized snowmobile suspension component engineered for responsive handling, controlled damping, and improved bottom-out resistance. This FOX shock uses Rifle-Bore position-sensitive damping technology, with spiral grooves inside the shock body that allow oil to flow around the main piston during the ride zone for a smoother, more compliant feel. As the shock reaches the final portion of its travel, the grooves end and direct oil through the main piston to increase bottom-out resistance during hard impacts.

Designed for select Polaris snowmobiles, this adjustable ski shock fits the 2018 Polaris 600 Pro-RMK 155-inch, 800 SKS 155-inch, 800 Pro-RMK 155-inch, and 800 RMK Assault 155-inch models. Fitment also includes the 2019 Polaris 600 Pro-RMK 155-inch, 800 SKS 155-inch, 800 Pro-RMK 155-inch, 800 RMK Assault 155-inch, 850 Pro-RMK 155-inch, and 850 SKS 146-inch models. Verify the exact model and suspension configuration before installation.

The Factory Series shock features a lighter piston and shaft, a compact body, optimized reservoir length, a double-digressive aluminum piston, and a high-pitch spring design. Aluminum and injection-molded polymer mounting hardware help reduce weight while maintaining durability. The QS3 three-position compression adjustment allows quick tuning for changing trail and terrain conditions. The shock is fully rebuildable and revalveable for long-term serviceability and customized suspension performance.

Finished with black Type III anodized bodies and orange reservoir caps, the FOX Ski 1.5 Zero QS LRW Adjustable Shock combines updated styling with practical performance upgrades. The manufacturer part number and vendor part number are both 850-02-050. FOX is the brand and manufacturer.

Features:

• FOX Factory Series Ski 1.5 Zero QS LRW adjustable shock for select Polaris snowmobiles
• Rifle-Bore bodies provide position-sensitive damping for a plush ride zone and increased bottom-out resistance
• Lightweight piston and shaft reduce overall shock weight
• Compact shock body with optimized reservoir length
• QS3 three-position compression adjustment
• Double-digressive aluminum piston
• High-pitch spring design and high-volume bearing
• Aluminum and injection-molded polymer mounting hardware
• Fully rebuildable and revalveable for service and custom tuning
• Black Type III anodized bodies with orange reservoir caps
• Fits 2018 Polaris 600 Pro-RMK 155-inch, 800 SKS 155-inch, 800 Pro-RMK 155-inch, and 800 RMK Assault 155-inch models
• Fits 2019 Polaris 600 Pro-RMK 155-inch, 800 SKS 155-inch, 800 Pro-RMK 155-inch, 800 RMK Assault 155-inch, 850 Pro-RMK 155-inch, and 850 SKS 146-inch models
• Manufacturer and vendor part number 850-02-050

Fitment:
2018 Polaris 600 Pro-RMK 155"
2018 Polaris 800 Pro-RMK 155 3"
2018 Polaris 800 Pro-RMK 155"
2018 Polaris 800 Pro-RMK 163 3"
2018 Polaris 800 Pro-RMK 163"
2018 Polaris 800 Pro-RMK 174"
2018 Polaris 800 RMK Assault 155"
2018 Polaris 800 SKS 146"
2018 Polaris 800 SKS 155"
2019 Polaris 600 Pro-RMK 155"
2019 Polaris 800 Pro-RMK 155"
2019 Polaris 800 Pro-RMK 163"
2019 Polaris 800 Pro-RMK 174"
2019 Polaris 800 RMK Assault 155"
2019 Polaris 800 SKS 146"
2019 Polaris 800 SKS 155"
2019 Polaris 850 Pro-RMK 155"
2019 Polaris 850 Pro-RMK 163"
2019 Polaris 850 Pro-RMK 174"
2019 Polaris 850 SKS 146"
2019 Polaris 850 SKS 155"
2021 Polaris 600 Pro-RMK 155"
2021 Polaris 850 Pro-RMK 155 3"
2021 Polaris 850 Pro-RMK 155"
2021 Polaris 850 Pro-RMK 163 3"
2021 Polaris 850 Pro-RMK 163"
2021 Polaris 850 Pro-RMK QD2 155 2.75"
2021 Polaris 850 Pro-RMK QD2 155 3"
2021 Polaris 850 Pro-RMK QD2 163 3"
2021 Polaris 850 Pro-RMK QD2 165 2.75"
2021 Polaris 850 Pro-RMK QD2 174"
2021 Polaris 850 RMK KHAOS 155 3"
2021 Polaris 850 RMK Khaos 155"
2021 Polaris 850 RMK KHAOS QD2 155 2.75"
2021 Polaris 850 RMK KHAOS QD2 155 3"
2021 Polaris 850 RMK KHAOS QD2 163 3"
2021 Polaris 850 RMK KHAOS QD2 165 2.75"
2021 Polaris 850 SKS 146"
2021 Polaris 850 SKS 155"
2022 Polaris 850 Pro-RMK Matryx 155"
2022 Polaris 850 Pro-RMK Matryx Slash 155 2.75"
2022 Polaris 850 Pro-RMK Matryx Slash 155 3"
2022 Polaris 850 Pro-RMK Matryx Slash 163 3"
2022 Polaris 850 Pro-RMK Matryx Slash 165 2.75"
2022 Polaris 850 RMK Khaos Matryx 155"
2022 Polaris 850 RMK Khaos Matryx Slash 146"
2022 Polaris 850 RMK Khaos Matryx Slash 155"
2022 Polaris 850 RMK Khaos Matryx Slash 163 3"
2022 Polaris 850 RMK Khaos Matryx Slash 165 2.75"
2022 Polaris Patriot Boost Pro-RMK Matryx Slash 163 2.75"
2022 Polaris Patriot Boost Pro-RMK Matryx Slash 165 2.75"
2023 Polaris 650 Pro-RMK 155"
2023 Polaris 850 Pro-RMK 155"
2023 Polaris 850 RMK Khaos 155"
2023 Polaris 850 RMK Khaos Slash 163.3"
2023 Polaris 850 RMK Pro Slash 155"
2023 Polaris 850 RMK Pro Slash 163"
2023 Polaris 850 RMK Pro Slash 165"
2023 Polaris Patriot 9R Pro-RMK Slash 155"
2023 Polaris Patriot 9R Pro-RMK Slash 163.3"
2023 Polaris Patriot 9R Pro-RMK Slash 165"
2023 Polaris Patriot 9R RMK Khaos Slash 155"
2023 Polaris Patriot 9R RMK Khaos Slash 163"
2023 Polaris Patriot 9R RMK Khaos Slash 165"
2023 Polaris Patriot Boost RMK Khaos Slash 163"
2023 Polaris Patriot Boost RMK Khaos Slash 165"
2023 Polaris Patriot Boost RMK Pro Slash 155"
2023 Polaris Patriot Boost RMK Pro Slash 163"
2024 Polaris 650 Pro-RMK 155"
2024 Polaris 650 RMK Khaos Slash 146"
2024 Polaris 850 Pro-RMK 155"
2024 Polaris 850 RMK Khaos 155"
2024 Polaris 850 RMK Khaos Slash 146"
2024 Polaris 850 RMK Khaos Slash 155"
2024 Polaris 850 RMK Khaos Slash 165"
2024 Polaris 850 RMK Pro Slash 155"
2024 Polaris 850 RMK Pro Slash 165"
2024 Polaris Patriot 9R Pro-RMK Slash 155"
2024 Polaris Patriot 9R Pro-RMK Slash 165"
2024 Polaris Patriot 9R RMK Khaos Slash 146"
2024 Polaris Patriot 9R RMK Khaos Slash 155"
2024 Polaris Patriot 9R RMK Khaos Slash 165"
2024 Polaris Patriot Boost RMK Khaos Slash 155"
2024 Polaris Patriot Boost RMK Khaos Slash 165"
2024 Polaris Patriot Boost RMK Pro Slash 155"
2024 Polaris Patriot Boost RMK Pro Slash 165"
2025 Polaris 850 Pro-RMK 155"
2025 Polaris 850 RMK Khaos 155"
2025 Polaris 850 RMK Khaos Slash 155"
2025 Polaris 850 RMK Khaos Slash 165"
2025 Polaris 850 RMK Pro Slash 155"
2025 Polaris Patriot Boost RMK Khaos Slash 155"
2026 Polaris 850 Pro-RMK 155"
2026 Polaris 850 RMK Khaos 155"