Rough Country's M1 Monotube rear shocks give your 2015-2026 4WD F-150 the damping performance it needs after dropping it with a 4-inch Rough Country lowering kit. Sold in pairs, these nitrogen-charged monotube shocks replace the factory units with a purpose-built design that keeps pace with a lowered stance on the street while holding up to the demands of daily truck use. Installation wraps up in one to two hours with basic hand tools.
Monotube nitrogen charging eliminates cavitation. An internal floating piston separates the shock oil from the high-pressure nitrogen charge at all times. That separation means no oil foaming, no fade under repeated compression cycles, and a consistent damping response whether you are commuting or pushing the truck harder on a winding road.
Digressive valving reacts instantly to surface changes. The 46mm digressive piston uses self-adjusting, deflective-disc independent rebound and compression circuits that read the road surface and respond without delay. The result is a compliant ride over small bumps with firm, controlled damping when the chassis loads up through a corner or over a larger impact.
Built to last in real-world conditions. The 18mm centerless-ground, case-hardened, chromed, and super-polished rod resists wear and bending across years of use. The shock body is zinc-plated for corrosion resistance, and durable vulcanized natural rubber bushings handle the mounting loads without deteriorating from heat or road grime. The M1 is designed to mount body-up for a clean, visible installation under the lowered truck.
Product Benefits
- Sold in Pairs: Both rear shocks included in one kit for a complete axle replacement.
- Nitrogen-Charged Monotube Design: Internal floating piston separates oil and nitrogen for fade-free, cavitation-free performance.
- 46mm Digressive Piston: Instantly adapts compression and rebound to changing road surfaces.
- 18mm Super-Polished Rod: Centerless-ground, case-hardened, and chromed for long-term durability and precise travel.
- 2-Inch Seamless Extruded Tube: Provides structural rigidity and consistent wall thickness throughout the shock body.
- Zinc-Plated Body: Resists corrosion from road salt, moisture, and harsh elements.
- Vulcanized Natural Rubber Bushings: Durable mounting bushings absorb noise and vibration without premature degradation.
- Body-Up Mount Orientation: Clean, functional installation that suits the lowered F-150 profile.
- Fast Installation: Bolt-on fitment in approximately one to two hours.
- 3-Year Manufacturer Warranty: Backed by Rough Country's standard warranty coverage.
Note: Fits 2015-2026 F-150 4WD models only. Designed to work specifically with Rough Country's 4-inch lowering kit.
About Rough Country: Rough Country produces suspension lifts, leveling kits, lowering kits, and related accessories for trucks and SUVs. The brand focuses on delivering performance-oriented hardware at accessible price points, with an extensive catalog covering a wide range of domestic and import platforms.
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Product Specifications & Vehicle Fitment
Review the product details and confirm compatibility with your vehicle before ordering.
| Specification | Details |
|---|---|
| Vehicle Trim | King Ranch, Lariat, Limited, Platinum, Raptor, STX, Tremor, XL, XLT |
| Vehicle Fitment | 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 |
