Rancho RS5000X Series Rear Shock Absorber for 1999-2016 Ford F-250/F-350 Super Duty RS55261

Fits 1999-2016 Ford F-250 and F-350 Super Duty 2WD/4WD models. The Rancho RS5000X RS55261 shock absorber is a twin-tube gas-pressurized unit designed to deliver improved handling and control for heavy-duty pickups. Featuring Rancho's exclusive Cross Tuned technology, this shock uses a unique rebound valving system and advanced compression phase to manage wheel travel on and off-road, effectively reducing damping fade and foaming.

• Precision Valving: Progressive Engagement Valving is custom-tuned to reduce initial impacts at low speeds while maintaining control during aggressive maneuvers.
• Heavy-Duty Construction: Built with a 16mm nitro-carburized piston rod for superior corrosion resistance and double-welded loops at high-stress points.
• Advanced Internals: Features a 35mm sintered iron piston for structural integrity and a low-friction, self-lubricating seal to retain gas and oil.
• Gas Pressurized: Nitrogen gas charged to 150 PSI to minimize air-to-oil mixture and ensure consistent performance in extreme conditions.
• All-Weather Performance: Large twin-tube body is filled with specialized fluid capable of withstanding internal temperatures ranging from -40 to 248°F.
• Included Hardware: Comes equipped with a polyvinyl protective boot and durable rubber bushings to absorb ride harshness.