Rancho RS55287 RS5000X Lifted Rear Shock for 4WD Ford F-150

Vehicle Fitment

• 2004-2008 Ford F-150 4WD (4" Lift)
• 2015-2016 Ford F-150 4WD (2.5-4" Lift)
• 2017-2020 Ford F-150 4WD (3-4" Lift)

Features

• RS5000X Series rear gas-charged shock absorber for lifted trucks
• Twin-tube internal design with progressive engagement valving
• Advanced compression control valving for improved damping
• 16 mm nitro-carburized piston rod for corrosion resistance
• Full-displaced 35 mm bore for enhanced control
• Red polyvinyl protective boot to guard against debris
• Rubber bushings and double-welded loops on mounts
• Direct bolt-on replacement for aftermarket or lifted suspension

Specifications

• Brand: Rancho
• Part Number: RS55287
• Series: RS5000X
• Position: Rear (Driver or Passenger Side)
• Design: Gas-charged twin tube
• Compressed Length: ~18.43 in
• Extended Length: ~30.59 in
• Shock Travel: ~12.16 in
• Mount Type: Eyelet/loop with rubber bushings
• Non-adjustable preset damping

Included Components

• 1x Rancho RS5000X RS55287 Rear Shock Absorber
• 1x Protective rubber bushings
• 1x Red polyvinyl dust boot

Product Description

The Rancho RS55287 is a rear RS5000X Series shock absorber engineered specifically for lifted Ford F-150 4WD trucks. Designed to work with 2.5-4" (and up to 4" in earlier models) suspension lifts, this gas-charged, twin-tube shock enhances ride quality, handling, and control on both paved and off-road surfaces. Its progressive engagement valving and advanced compression control help manage rebound and compression forces effectively, reducing harsh impacts and improving stability over rough terrain.

Constructed with a robust 35 mm bore and a nitro-carburized 16 mm rod for increased durability, the RS55287 resists corrosion and wear in demanding conditions. The protective red polyvinyl boot and rubber bushings add longevity against environmental elements. This shock is ideal for F-150 owners upgrading suspension for off-road use or towing with lifted setups and is a direct bolt-on performance replacement that maintains comfortable ride characteristics.