Rancho Suspension Shock Absorber P/N:RS55261

Smooth out the ride and keep your truck controlled with the Rancho RS5000X Suspension Shock Absorber RS55261. This rear shock installs as a direct-fit replacement for the 1999-2016 Ford F-250 Super Duty and the Ford F-350 Super Duty (1999-2004 and 2011-2016) — see the Buyer's Guide tab for engine details.

Built around Rancho's exclusive Cross Tuned technology, it pairs a rebound valving system with an advanced compression phase to improve overall handling on and off road. Progressive Engagement Valving is custom-tuned per application to help reduce initial low-speed impacts.

• Strong and durable: 16mm nitro-carburized piston rod to resist scuffs and corrosion, double-welded loops at stress areas, 35mm sintered iron piston, and a polyvinyl protective boot.
• Handles temperature swings: large twin-tube body filled with all-weather fluid for cooler operation, rated to withstand internal temps of -40 to 248°F.
• Reduces fade: nitrogen gas pressurized to 150 PSI to minimize air-to-oil mixing, foaming, and damping fade.
• Smoother response: polyurethane rebound bumper, rubber bushings, and a fluon-banded piston help absorb harshness.

Backed by Rancho's Limited Lifetime Warranty. Sold individually; replacing both rear shocks together is recommended for balanced ride control.

Interchange: RS5261 · 23160C