Rancho RS5000X Front Shock Absorber for Select 1975-1997 Ford and Mazda Trucks (RS55039)

The Rancho RS5000X Front Shock Absorber (RS55039) is engineered to provide precise handling and ride control for select 1975-1997 Ford Bronco II, E-100/E-150 Econoline, Explorer, Ranger, and Mazda B-Series pickups and SUVs. Built around a massive 2.25-inch twin-tube body, this gas-pressurized shock uses Cross Tuned technology to deliver high-performance valving that bridges the gap between on-road comfort and off-road stability.

This shock features Rancho's exclusive Progressive Engagement Valving, custom-tuned for each application to minimize initial impact at low speeds and reduce ride harshness. The internal assembly is pressurized with nitrogen gas to 150 PSI, which reduces aeration and prevents damping fade during heavy use. With a 35mm sintered iron piston and a 16mm nitro-carburized rod, the RS5000X is built to withstand extreme mechanical stress and resist corrosion in harsh environments.

• Precision Valving: Progressive Engagement Valving and Compression Control Valve regulate fluid transfer to maintain motion control without disc flutter.
• Extreme Durability: 16mm nitro-carburized piston rod and double-welded loops at high-stress points ensure long-term structural integrity.
• All-Weather Performance: Filled with specialized fluid rated for temperatures from -40 to 248°F for consistent dampening in all climates.
• Bore & Piston: 35mm sintered iron piston provides an expanded surface area for heightened motion control.
• Includes: Polyvinyl protective boot and rubber bushings to absorb ride vibration.
• Manufacturer Part Number: RS55039
• Warranty: Rancho Limited Lifetime Warranty.