Rancho RS999311 RS9000XL Rear Shock Absorber | Fits 2005-2021 Nissan Frontier

The Rancho RS999311 is a performance-oriented rear shock absorber from the RS9000XL series, engineered to enhance ride quality, control, and durability for Nissan Frontier trucks running a stock rear suspension setup. This adjustable shock delivers nine levels of damping control so you can fine-tune the ride to match driving conditions—from smooth highway cruising to rugged off-road terrain—with simple, manual adjustment. The gas-charged twin-tube design minimizes shock fade and maintains consistent performance under load, while a robust body with corrosion-resistant finish and protective boot improves longevity. Built with heavy-duty components and OE-style mounting, the RS999311 installs directly into the rear suspension with no modifications required, making it an excellent upgrade for daily drivers, weekend adventurers, and trucks equipped with mild front lift setups. Backed by a Rancho limited lifetime warranty, this shock offers customizable performance, improved stability, and enhanced handling for your Frontier. 

Features

• Rear RS9000XL series performance shock

• Nine-position adjustable damping control

• Gas-charged twin-tube internal design

• Direct bolt-on OE-style fitment

• Designed for stock rear ride height (0″)

• Helps improve rear stability and control

• Reduces shock fade under load

• Large, robust shock body for durability

• Protective boot guards rod and seal

• Polyurethane bushings for performance and durability

• Liquid metallic corrosion-resistant finish

• Heavy-duty 18 mm piston rod for strength

• Handles varied terrain and towing loads

• Smooth response across conditions

• Ideal for on-road and off-road use

• Performance tuning for ride quality preference

• Designed to complement front lift/level setups

• Engineered for consistency under repeated cycling

• Long service life with proper maintenance

• Covered by Rancho limited lifetime warranty 

Item Specs

• Brand: Rancho

• Series: RS9000XL

• Manufacturer Part Number: RS999311

• Position: Rear

• Designed Lift Height: 0″ (stock rear)

• Shock Type: Performance adjustable shock absorber

• Internal Design: Twin-tube

• Damping Adjustability: 9-position manual

• Gas Charged: Yes

• Extended Length: ~21.13 in

• Compressed Length: ~13.69 in

• Travel / Stroke Length: ~7.44 in

• Mount Type Upper: Loop eyelet

• Mount Type Lower: Loop eyelet/sleeve

• Bushing Material: Polyurethane

• Protective Boot Included: Yes

• Finish: Silver / liquid metallic

• Weight: Approx. 5.3–5.8 lbs (varies by source)

• Warranty: Rancho limited lifetime

• Application: Direct fit replacement

• Corrosion-Resistant Coating: Yes

• Designed for Performance & Durability

• Vehicle Type: Truck / SUV

• Ride Control: Adjustable damping

• Installation: Bolt-on without modification

• Condition: New

• Supplier Style: Specialty rear shock absorber 

Vehicle Fitment

• 2005–2021 – Nissan – Frontier – Rear – All models / 2WD & 4WD (0″ rear ride height) 

Included in Package

• (1) Rancho RS999311 RS9000XL Rear Shock Absorber

• Protective dust boot

• Polyurethane bushing(s)

• Rancho limited lifetime warranty documentation