{"product_id":"fox-factory-series-1-5-zero-qs-lrw-adjustable-rear-track-shock-part-number-850-02-045","title":"FOX Factory Series 1.5 Zero QS LRW Adjustable Rear Track Shock, Part Number 850-02-045","description":"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!\n\u003cp\u003eThe FOX Factory Series 1.5 Zero QS LRW Adjustable Rear Track Shock is a high-performance suspension upgrade engineered for select Ski-Doo Summit snowmobiles. Model 850-02-045 features FOX Rifle-Bore technology, which uses internal spiral grooves to control oil flow around the main piston. This position-sensitive damping design helps deliver a plush ride through the initial portion of travel while increasing bottom-out resistance during harder impacts.\u003c\/p\u003e\u003cp\u003eThe redesigned Factory Series shock uses a lighter piston and shaft, an optimized reservoir, and weight-conscious body caps to reduce overall weight without sacrificing durability. Its double digressive aluminum piston, high-pitch spring design, and high-volume bearing support consistent suspension performance in demanding mountain terrain. The shock has a black Type III anodized body with orange reservoir caps and is fully rebuildable and revalveable for long-term serviceability and tuning flexibility.\u003c\/p\u003e\u003cp\u003eAdjustability includes QS3 three-position compression control for quick trail or terrain changes. On applicable rear track configurations, the QSL lockout system provides additional control, while QSE-equipped models allow the rear track shock to be locked out using a handlebar-mounted switch. Aluminum and injection-molded poly mounting hardware are included as part of the optimized design. This FOX shock fits select 2017-2019 Ski-Doo Summit models, including Summit Burton 800R E-TEC, Summit SP 800R E-TEC, Summit SP 850 E-TEC, and Summit X 850 E-TEC applications with 146-inch and 154-inch tracks, including specified 3.0-inch configurations. Verify the exact model, year, track length, and suspension configuration before ordering.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFitment: Select 2017-2019 Ski-Doo Summit snowmobiles with 146-inch or 154-inch tracks, including specified 3.0-inch configurations\u003c\/li\u003e\n\u003cli\u003eModel: Factory Series 1.5 Zero QS LRW Adjustable Rear Track Shock\u003c\/li\u003e\n\u003cli\u003eBrand: FOX\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: 850-02-045\u003c\/li\u003e\n\u003cli\u003eRifle-Bore Bodies: Position-sensitive damping helps provide a plush ride and increased bottom-out resistance\u003c\/li\u003e\n\u003cli\u003eWeight Optimization: Features a 60% lighter piston, 20% lighter shaft, smaller overall size, and optimized reservoir length\u003c\/li\u003e\n\u003cli\u003eAdjustability: QS3 three-position compression adjustment supports quick suspension tuning\u003c\/li\u003e\n\u003cli\u003eLockout: QSL lockout system is available on rear track applications, with QSE handlebar-switch compatibility on select models\u003c\/li\u003e\n\u003cli\u003eConstruction: Includes a double digressive aluminum piston, high-pitch spring design, and high-volume bearing\u003c\/li\u003e\n\u003cli\u003eMounting Hardware: Uses aluminum and injection-molded poly mounting hardware\u003c\/li\u003e\n\u003cli\u003eServiceability: Fully rebuildable and revalveable for long-term maintenance and custom tuning\u003c\/li\u003e\n\u003cli\u003eFinish: Black Type III anodized body with orange reservoir caps\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2017 Ski-Doo Summit Burton 800R E-TEC 154\"\u003cbr\u003e\n2017 Ski-Doo Summit SP 800R E-TEC 146\"\u003cbr\u003e\n2017 Ski-Doo Summit SP 800R E-TEC 154\"\u003cbr\u003e\n2017 Ski-Doo Summit SP 850 E-TEC 154\"\u003cbr\u003e\n2017 Ski-Doo Summit SP 850 E-TEC 165\"\u003cbr\u003e\n2017 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2017 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2017 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2018 Ski-Doo Summit SP 850 E-TEC 146\"\u003cbr\u003e\n2018 Ski-Doo Summit SP 850 E-TEC 154\"\u003cbr\u003e\n2018 Ski-Doo Summit SP 850 E-TEC 165\"\u003cbr\u003e\n2018 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2018 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2018 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2019 Ski-Doo Summit SP 850 E-TEC 146\"\u003cbr\u003e\n2019 Ski-Doo Summit SP 850 E-TEC 154\"\u003cbr\u003e\n2019 Ski-Doo Summit SP 850 E-TEC 165\"\u003cbr\u003e\n2019 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2019 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2019 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2020 Ski-Doo Summit SP 850 E-TEC 146\"\u003cbr\u003e\n2020 Ski-Doo Summit SP 850 E-TEC 154\"\u003cbr\u003e\n2020 Ski-Doo Summit SP 850 E-TEC 165\"\u003cbr\u003e\n2020 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2020 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2020 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2020 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/3.0\"\u003cbr\u003e\n2020 Ski-Doo Summit X 850 with Expert Package E-TEC 165\"\/3.0\"\u003cbr\u003e\n2021 Ski-Doo Summit SP 850 E-TEC 146\"\u003cbr\u003e\n2021 Ski-Doo Summit SP 850 E-TEC 154\"\u003cbr\u003e\n2021 Ski-Doo Summit SP 850 E-TEC 165\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 E-TEC Turbo 154\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/3.0\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 with Expert Package E-TEC 165\"\/3.0\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 with Expert Package E-TEC 175\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo 154\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo 165\"\u003cbr\u003e\n2021 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo 175\"\u003cbr\u003e\n2022 Lynx Boondocker 850 E-TEC DS 3900\u003cbr\u003e\n2022 Lynx Boondocker 850 E-TEC DS 4100\u003cbr\u003e\n2022 Ski-Doo Summit SP 850 E-TEC 146\"\u003cbr\u003e\n2022 Ski-Doo Summit SP 850 E-TEC 154\"\u003cbr\u003e\n2022 Ski-Doo Summit SP 850 E-TEC 165\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 E-TEC Turbo 154\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/2.5\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/3.0\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 with Expert Package E-TEC 165\"\/3.0\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo 154\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo 165\"\u003cbr\u003e\n2022 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo 175\"\u003cbr\u003e\n2023 Lynx Shredder DS-850 E-TEC 154\"\u003cbr\u003e\n2023 Lynx Shredder DS-850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2023 Lynx Shredder DS-850 E-TEC Turbo R 165\"\u003cbr\u003e\n2023 Lynx Shredder RE-850 E-TEC Turbo R 154\"\u003cbr\u003e\n2023 Ski-Doo Freeride 850 E-TEC 146\"\u003cbr\u003e\n2023 Ski-Doo Freeride 850 E-TEC 154\" Turbo\u003cbr\u003e\n2023 Ski-Doo Freeride 850 E-TEC 154\"\/2.5\"\u003cbr\u003e\n2023 Ski-Doo Freeride 850 E-TEC 165\"\u003cbr\u003e\n2023 Ski-Doo Freeride 850 E-TEC 165\" Turbo\u003cbr\u003e\n2023 Ski-Doo Freeride 850 E-TEC Turbo R 146\"\u003cbr\u003e\n2023 Ski-Doo Freeride 850 E-TEC Turbo R 154\"\u003cbr\u003e\n2023 Ski-Doo Summit Edge 850 E-TEC 154\" 2.5\u003cbr\u003e\n2023 Ski-Doo Summit Edge 850 E-TEC 165\"\u003cbr\u003e\n2023 Ski-Doo Summit Edge 850 E-TEC 175\"\u003cbr\u003e\n2023 Ski-Doo Summit Neo 600 EFI 146\"\u003cbr\u003e\n2023 Ski-Doo Summit Neo+ 600 EFI 146\"\u003cbr\u003e\n2023 Ski-Doo Summit SP 850 E-TEC 146\"\u003cbr\u003e\n2023 Ski-Doo Summit SP 850 E-TEC 154\"\u003cbr\u003e\n2023 Ski-Doo Summit SP 850 E-TEC 165\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 E-TEC Turbo R 165\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 with Expert Package E-TEC 165\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 165\"\/3.0\"\u003cbr\u003e\n2023 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 175\"\u003cbr\u003e\n2024 Lynx Shredder DS-850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2024 Lynx Shredder DS-850 E-TEC Turbo R 165\"\u003cbr\u003e\n2024 Lynx Shredder RE-850 E-TEC 146\"\u003cbr\u003e\n2024 Lynx Shredder RE-850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2024 Lynx Shredder RE-850 E-TEC Turbo R 146\"\u003cbr\u003e\n2024 Lynx Shredder RE-850 E-TEC Turbo R 154\"\u003cbr\u003e\n2024 Ski-Doo Freeride 850 E-TEC 146\"\u003cbr\u003e\n2024 Ski-Doo Freeride 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit Neo 600 EFI 146\"\u003cbr\u003e\n2024 Ski-Doo Summit Neo+ 600 EFI 146\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 E-TEC Turbo R 154\"\/2.5\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 E-TEC Turbo R 165\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 with Expert Package E-TEC 165\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 165\"\/3.0\"\u003cbr\u003e\n2024 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 175\"\u003cbr\u003e\n2025 Lynx Shredder DS-850 E-TEC 154\"\u003cbr\u003e\n2025 Lynx Shredder DS-850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2025 Lynx Shredder DS-850 E-TEC Turbo R 165\"\u003cbr\u003e\n2025 Lynx Shredder RE-850 E-TEC 146\"\u003cbr\u003e\n2025 Lynx Shredder RE-850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2025 Lynx Shredder RE-850 E-TEC Turbo R 146\"\u003cbr\u003e\n2025 Lynx Shredder RE-850 E-TEC Turbo R 154\"\u003cbr\u003e\n2025 Ski-Doo Freeride 850 E-TEC 146\"\u003cbr\u003e\n2025 Ski-Doo Freeride 850 E-TEC 154\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Freeride 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Freeride 850 E-TEC 165\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 E-TEC 154\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 E-TEC Turbo R 165\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 E-TEC Turbo R 165\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC 154\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC 165\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC 165\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 154\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 165\"\/2.5\"\u003cbr\u003e\n2025 Ski-Doo Summit X 850 with Expert Package E-TEC Turbo R 165\"\/3.0\"\u003cbr\u003e\n2026 Lynx Shredder DS-850 E-TEC 154\"\u003cbr\u003e\n2026 Lynx Shredder DS-850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2026 Lynx Shredder DS-850 E-TEC Turbo R 165\"\u003cbr\u003e\n2026 Lynx Shredder RE-850 E-TEC 146\"\u003cbr\u003e\n2026 Lynx Shredder RE-850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2026 Lynx Shredder RE-850 E-TEC Turbo R 146\"\u003cbr\u003e\n2026 Lynx Shredder RE-850 E-TEC Turbo R 154\"\u003cbr\u003e\n2026 Ski-Doo Freeride 850 E-TEC 146\"\u003cbr\u003e\n2026 Ski-Doo Freeride 850 E-TEC 154\"\/2.5\"\u003cbr\u003e\n2026 Ski-Doo Freeride 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2026 Ski-Doo Summit X 850 E-TEC 154\"\/2.5\"\u003cbr\u003e\n2026 Ski-Doo Summit X 850 E-TEC 154\"\/3.0\"\u003cbr\u003e\n2026 Ski-Doo Summit X 850 E-TEC 165\"\/2.5\"\u003cbr\u003e\n2026 Ski-Doo Summit X 850 E-TEC 165\"\/3.0\"\u003cbr\u003e\n2026 Ski-Doo Summit X 850 E-TEC Turbo R 154\"\/3.0\"\u003cbr\u003e\n2026 Ski-Doo Summit X 850 E-TEC Turbo R 165\"\/3.0\"","brand":"FOX","offers":[{"title":"Default Title","offer_id":67551848562923,"sku":"530-1260","price":1199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/ef28-6877d82805b89.png?v=1790729182","url":"https:\/\/ctracingservices.com\/products\/fox-factory-series-1-5-zero-qs-lrw-adjustable-rear-track-shock-part-number-850-02-045","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}