Smooth out the ride and sharpen control on and off the pavement with the Rancho RS5000X Suspension Shock Absorber RS55118. Built with Rancho's exclusive Cross Tuned technology — a rebound valving system and advanced compression phase — it's designed to improve overall handling and performance both on- and off-road. Depending on the application, it installs in the front, rear, or front inner position and is sold individually.
- Cross Tuned technology: exclusive rebound valving and advanced compression phase to improve handling and performance on and off road.
- Strong and durable: 16mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas, a 35mm sintered iron piston, and a polyvinyl protective boot.
- Handles temperature swings: large 2-1/4 in twin-tube body filled with all-weather fluid for cooler operation, rated to withstand internal temperatures of -40 to 248°F.
- Reduces fade: nitrogen gas pressurized to 150 PSI to minimize air-to-oil mixing and reduce damping fade and foaming.
Progressive Engagement Valving and a Compression Control Valve are custom-tuned per vehicle to help reduce initial impacts and maintain shock motion control, while polyurethane rebound bumpers and rubber bushings help absorb ride harshness. Backed by Rancho's Limited Lifetime Warranty.
Fitment includes: 1969-1974 & 1987-1991 Chevrolet Blazer, 1983-1993 Chevrolet S10, 1966-1996 Ford Bronco, 1980-1996 Ford F-150, 1980-1997 Ford F-350, and many more. See the Buyer's Guide tab for the full list.
Interchange: 210234 · 34671 · 37144 · 911144 · 76671 · RS5118 · N8023
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What is the Rancho RS55118?
It's a Rancho RS5000X twin-tube suspension shock absorber that uses Cross Tuned rebound valving and an advanced compression phase to improve handling and ride control on and off road. It's sold individually.
Which position does this shock fit?
Depending on the application it installs in the front, rear, or front inner position. Check the Buyer's Guide tab to confirm the correct position for your specific vehicle.
What vehicles does the RS55118 fit?
It fits a wide range of Chevrolet, GMC, Dodge, and Ford trucks, SUVs, and vans, including the Ford Bronco, F-150, and Chevrolet Blazer and S10. See the Buyer's Guide tab for all 147 applications.
How is the RS55118 built for durability?
It features a 16mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas, a 35mm sintered iron piston, and a polyvinyl protective boot.
Does this shock come with a warranty?
Yes. The Rancho RS5000X RS55118 is backed by Rancho's Limited Lifetime Warranty.
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