Upgrade your snowmobile suspension with the FOX 1.5 ZERO QS3-R mountain ski shock, designed for riders who prefer the predictable feel and tunability of a traditional coil-over shock. Its 1.5-inch bore body and adjustable velocity-sensitive damping deliver controlled performance across changing terrain, while the FOX QS3 tool-free adjuster lets you select from three calibrated ride-control settings with a quick flip of the switch.
Built by FOX with a Genuine Kashima Coat 6061-T6 aluminum body and super-finished hard-chrome steel shaft, this shock is engineered for durability and consistent operation. FOX Ice Scraper Technology (FIST) helps protect performance in snow conditions, while the high-flow damping piston and wide-range rebound control provide noticeable changes in ride quality, comfort, and handling. Spring preload adjustment allows further setup refinement for rider preference and trail conditions.
The FOX 1.5 ZERO QS3-R is fully rebuildable and re-valveable, making it a long-term suspension solution for demanding mountain riding. Aerospace-grade PTFE-lined spherical bearings help support smooth movement and reliable fitment. Manufacturer part number 850-02-029 and vendor part number 530-2883 identify this FOX replacement shock. It fits select 2017 and 2018 Ski-Doo Summit models, including Summit SP 600 HO E-TEC models with 146-inch and 154-inch tracks, Summit SP 800R E-TEC 146-inch and 154-inch models, Summit SP 850 E-TEC 146-inch models, and Summit X 850 E-TEC 154-inch models with 3.0-inch lug tracks.
Features:
- Type: Mountain snowmobile ski shock
- Spring: Traditional coil-over design
- Adjustment: Three-position FOX QS3 tool-free compression switch
- Damping: Wide-range rebound adjustment with velocity-sensitive control
- Construction: Genuine Kashima Coat 6061-T6 aluminum shock body
- Performance: High-flow damping piston for responsive suspension control
- Protection: FOX Ice Scraper Technology (FIST)
- Bearings: Aerospace-grade PTFE-lined spherical bearings
- Serviceability: Fully rebuildable and re-valveable
- Fitment: Select 2017–2018 Ski-Doo Summit SP and Summit X models
- Brand: FOX
- Manufacturer part number: 850-02-029
- Vendor part number: 530-2883
Fitment:
2017 Ski-Doo Summit SP 600 HO E-TEC 146"
2017 Ski-Doo Summit SP 600 HO E-TEC 154"
2017 Ski-Doo Summit SP 800R E-TEC 146"
2017 Ski-Doo Summit SP 800R E-TEC 154"
2017 Ski-Doo Summit SP 850 E-TEC 146"
2017 Ski-Doo Summit SP 850 E-TEC 154"
2017 Ski-Doo Summit SP 850 E-TEC 165"
2017 Ski-Doo Summit X 800R E-TEC 174"
2017 Ski-Doo Summit X 850 E-TEC 154"/3.0"
2018 Ski-Doo Summit SP 600 HO E-TEC 146"
2018 Ski-Doo Summit SP 600 HO E-TEC 154"
2018 Ski-Doo Summit SP 850 E-TEC 146"
2018 Ski-Doo Summit SP 850 E-TEC 154"
2018 Ski-Doo Summit SP 850 E-TEC 165"
2018 Ski-Doo Summit SP 850 E-TEC 175"
2018 Ski-Doo Summit X 850 E-TEC 154"/3.0"
2020 Ski-Doo Summit SP 600R E-TEC 146"
2020 Ski-Doo Summit SP 600R E-TEC 154"
2020 Ski-Doo Summit SP 850 E-TEC 154"
2020 Ski-Doo Summit SP 850 E-TEC 175"
2020 Ski-Doo Summit X 850 E-TEC 154"/3.0"
2020 Ski-Doo Summit X 850 with Expert Package E-TEC 154"/3.0"
2021 Ski-Doo Summit SP 600R E-TEC 146"
2021 Ski-Doo Summit SP 850 E-TEC 146"
2021 Ski-Doo Summit X 850 E-TEC 154"/3.0"
2021 Ski-Doo Summit X 850 E-TEC Turbo 154"