Rancho Suspension RS55378 RS5000X Twin Tube Gas Shock Absorber

The Rancho RS5000X RS55378 Shock Absorber delivers superior on-road comfort and off-road performance through innovative Cross Tuned technology. Designed for heavy-duty truck applications, this gas-pressurized shock features a patented rebound valving system and advanced compression phase that elevate overall vehicle handling and control.

Key Features:

• Cross Tuned Technology with patented rebound valving system and progressive compression discs
• Enlarged 2.25-inch diameter twin-tube body for increased fluid capacity and cooler operation
• Gas pressurized to 150 PSI to minimize foaming and shock fade
• 16mm nitrocarburized piston rod for superior strength and corrosion resistance
• Application-specific piston delivers heightened control with expanded piston area
• All-weather fluid withstands temperatures from -40°F to 248°F
• Low-friction, self-lubricating seal retains gas and oil for quicker rebound and smoother compression
• Compression Control Valve custom-tuned to regulate fluid transfer and absorb impacts
• Protective boot included to shield shock rod and oil seal
• Nitrogen gas charged, non-adjustable design

The RS5000X series features Progressive Engagement Valving that allows early fluid flow when hitting potholes or trail obstacles, helping reduce harsh initial impacts while controlling fluid flow in a gradual manner. This technology ensures consistent tire-to-road contact for improved steering, handling, and braking while providing resistance to vehicle bounce, roll, sway, brake dive, and acceleration squat. Backed by Rancho's Limited Lifetime Warranty.