Shock Absorber

Features:

• Compatible with RAM and GM HD trucks
• Progressive valving smooths rough terrain
• Custom-tuned compression for better control
• 2.25-inch body runs cooler under load
• Gas pressurized to prevent shock fade
• 16 mm rod resists wear and corrosion
• 35 mm bore boosts damping performance
• Sintered iron piston increases durability
• Polyurethane rebound bumper absorbs impacts
• Rubber bushings reduce vibration and noise
• Protective boot shields vital shock components
• Double-welded loops add mounting strength

Take Control Of Rough Roads With Confidence

If your truck's ride feels too soft or too sloppy, the Rancho RS55056 shock absorber is a serious upgrade worth making. Designed specifically for 1999-2013 Dodge RAM 2500 and 3500 models, along with 2001-2010 GM 2500HD and 3500HD trucks, this shock gives your suspension the support it’s been missing. It’s built to handle the weight, towing demands, and rugged terrain that heavy-duty trucks often face. Rancho’s unique Progressive Engagement Valving comes into play right when you hit potholes, washboard roads, or unexpected trail bumps, softening the initial blow while maintaining control throughout the full range of motion. The result is a smoother, more confident ride whether you're loaded up for a weekend trip or crawling through rough terrain. Gas pressurization helps fight off shock fade, so you’ll keep that performance edge even under long hauls or off-road heat. The large twin-tube body runs cooler under pressure, giving you more consistent performance when the terrain gets unpredictable. Whether you're daily driving, towing heavy loads, or heading out on dirt roads, this shock brings better control, better comfort, and peace of mind.

Built With Smarter Valving For Demanding Conditions

Rancho packed the RS55056 with advanced engineering to deliver more than just a basic suspension upgrade. At the heart of this shock is a 35 mm full-displaced bore that improves fluid movement, giving you better handling across uneven terrain. Combined with a sintered iron piston and a glass-filled Fluon band, the shock delivers smoother piston travel and more consistent performance through every cycle. The tuned compression control valve is precisely calibrated to balance fluid flow under compression, allowing the shock to stay responsive without harsh feedback. A 16 mm nitro-carburized rod resists corrosion and scuffing, increasing durability for year-round use, while a polyurethane rebound bumper helps control motion under sudden rebound. You also get a self-lubricating seal that retains oil and gas, shielding internal components from debris and helping extend shock life. Wrapped with a red protective boot and mounted with double-welded loops, the RS55056 is built for long-term durability on and off the pavement. Every detail is engineered for strength, control, and smoother ride quality, no matter where your truck takes you.

Fitment: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Dodge RAM 2500/3500

Notes:

• Designed for 1999-2013 Dodge RAM 2500/3500 models
• Also fits 2001-2010 GM 2500HD/3500HD applications
• Sold individually, not as a pair or set
• Shock position may vary depending on vehicle setup
• Part of the RS5000X series from Rancho
• Engineered for both on-road and off-road use
• Ideal for trucks with stock or slightly lifted suspensions
• Red protective boot included with each shock
• Backed by Rancho’s limited lifetime warranty
• Professional installation recommended for best results