Fits select 2007-2018 Jeep Wrangler and Wrangler JK models (Rubicon, Sahara, Sport, X, and Unlimited).

The Rancho RS5000X front shock absorber (RS55329) is a gas-pressurized twin-tube unit engineered for drivers who demand both highway comfort and off-road capability. Utilizing Rancho's exclusive Progressive Engagement Valving, the RS5000X is custom-tuned to reduce harsh initial impacts at low speeds while maintaining firm control during aggressive maneuvers or rough trail conditions.

Construction features include a heavy-duty 16mm nitro-carburized piston rod for superior scuff and corrosion resistance and a 35mm sintered iron piston for long-term structural integrity. To ensure consistent performance in any climate, the shock is filled with all-weather fluid designed to operate within a temperature range of -40 to 248°F.

• Nitrogen gas pressurized to 150 PSI to minimize aeration, foaming, and damping fade.
• 35mm sintered iron piston and 16mm nitro-carburized rod for enhanced durability.
• Cross Tuned technology with application-specific compression and rebound valving.
• Double-welded loops at critical stress points for off-road reliability.
• Polyurethane rebound bumper and rubber bushings to absorb ride harshness.
• Includes a protective polyvinyl boot to shield the piston rod from dirt and debris.
• Manufacturer Part Number: RS55329

Fits 2007-2018 Jeep Wrangler and Wrangler JK (Rubicon, Sahara, Sport, X, 70th/75th Anniversary).

The Rancho RS5000X Series rear shock absorber is engineered to provide improved handling and performance both on and off-road. Utilizing Cross Tuned technology and a unique Progressive Engagement Valving system, this shock reduces initial impacts at low speeds while maintaining control during aggressive maneuvers. The large twin-tube body is nitrogen-charged to 150 PSI, effectively minimizing aeration and foaming to ensure consistent damping performance even under demanding conditions.

• Piston Construction: 35mm sintered iron piston with a fluon-banded seal for enhanced responsiveness and structural integrity.
• Piston Rod: 16mm nitro-carburized rod resists scuffs and corrosion.
• Temperature Range: All-weather fluid allows for operation from -40 to 248°F.
• Durable Design: Double-welded loops at stress areas and a polyvinyl protective boot for off-road longevity.
• Ride Quality: Polyurethane rebound bumper and rubber bushings absorb harshness, while the Compression Control Valve regulates fluid transfer without disc flutter.
• MPN: RS55328

Fits select 2007-2018 Jeep Wrangler and Wrangler JK models including Rubicon, Sahara, Sport, and Unlimited trims.

The Rancho RS5000X series is engineered to deliver a versatile ride that handles both highway commuting and technical off-road trails. Utilizing a large 2.25-inch twin-tube body, this shock features Rancho’s exclusive Progressive Engagement Valving. This system is custom-tuned to each vehicle to reduce initial impacts at low speeds while maintaining firm control during high-speed maneuvers or when navigating rough terrain.

Built for long-term durability, the RS55326 features a 16mm nitro-carburized piston rod to resist scuffs and corrosion, along with double-welded loops at high-stress areas. The interior is filled with all-weather fluid and pressurized with nitrogen gas to 150 PSI, effectively minimizing air-to-oil foaming and damping fade under extreme temperatures ranging from -40 to 248°F.

• Series: RS5000X
• Position: Front
• Piston Rod: 16mm nitro-carburized
• Piston: 35mm sintered iron with fluon-banding
• Valving: Progressive Engagement Valving and Cross Tuned technology
• Gas Charge: Nitrogen gas pressurized to 150 PSI
• Protection: Polyvinyl protective boot included
• Hardware: Rubber bushings and polyurethane rebound bumper
• Part Number: RS55326

Fits 2007-2021 Toyota Tundra models including Base, Limited, SR5, Platinum, 1794 Edition, SR, Nightshade, and Trail.

The Rancho RS5000X series (part number RS55324) utilizes an advanced Progressive Engagement Valving system to provide a custom-tuned ride for your Toyota Tundra. Designed for both on-road comfort and off-road stability, this twin-tube gas-pressurized shock minimizes aeration and foaming while maintaining consistent damping performance under extreme conditions. The internal Cross Tuned technology features specific rebound valving and a unique compression phase to optimize handling across varied terrain.

• Heavy-Duty Construction: Features a 16mm nitro-carburized piston rod for superior scuff and corrosion resistance, plus double-welded loops at critical stress points.
• Precision Internal Components: Equipped with a 35mm sintered iron piston for structural integrity and a fluon-banded piston for increased responsiveness.
• All-Weather Performance: Large twin-tube body filled with all-weather fluid, capable of operating from -40 to 248°F.
• Ride Comfort: Integrated polyurethane rebound bumper and rubber bushings absorb harsh impacts and road noise.
• Gas Pressurized: Charged with nitrogen gas to 150 PSI to reduce damping fade.
• Protection: Includes a polyvinyl protective boot to shield the rod and oil seal from debris.

Fits 2005-2023 Toyota Tacoma models, including Base, Pre Runner, Limited, SR, SR5, TRD Off-Road, and TRD Sport.

The Rancho RS5000X RS55319 rear shock absorber is engineered to provide precise control and durability for both on-road comfort and off-road performance. Utilizing Rancho’s exclusive Progressive Engagement Valving, this shock reduces initial impacts at low speeds while maintaining control during high-speed articulation. The twin-tube design features a large body for increased fluid capacity, allowing the all-weather fluid to operate at cooler temperatures even under extreme conditions ranging from -40 to 248°F.

Built for longevity in harsh environments, the RS5000X features a 16mm nitro-carburized piston rod for superior corrosion resistance and double-welded loops at high-stress areas. A 150 PSI nitrogen gas charge minimizes aeration and foaming, ensuring consistent damping performance without fade during heavy use.

• Manufacturer Part Number: RS55319
• Piston: 35mm sintered iron for structural integrity
• Rod Material: 16mm nitro-carburized steel
• Gas Charge: 150 PSI nitrogen gas pressurized
• Valving: Cross Tuned technology with exclusive rebound valving system
• Sealing: Low-friction, self-lubricating seal
• Bushings: Polyurethane rebound bumper and rubber bushings
• Boot: Polyvinyl protective dust boot included

Fits select 2003-2013 Dodge Ram 1500, 2500, and 3500 trucks (including Power Wagon, Laramie, and ST models).

The Rancho RS5000X RS55317 front shock absorber utilizes a patented Cross Tuned technology system to provide a customized ride for your heavy-duty truck. By combining a progressive engagement valving system with a large twin-tube body, this shock helps minimize initial impacts and reduces performance fade under harsh conditions. The internal nitrogen gas charge is pressurized to 150 PSI, minimizing oil foaming and ensuring consistent damping performance.

Designed for durability both on and off-road, the RS5000X features a 16mm nitro-carburized piston rod for superior corrosion resistance and double-welded loops at high-stress points. The inclusion of a polyvinyl protective boot and polyurethane rebound bumpers ensures a longer service life by shielding internal components from debris and absorbing harsh ride impacts.

• Manufacturer Part Number: RS55317
• Series: RS5000X
• Internal Design: Twin-tube gas pressurized (150 PSI)
• Piston Rod: 16mm nitro-carburized rod with polyvinyl boot
• Piston: 35mm sintered iron piston for structural integrity
• Operating Range: Withstands temperatures from -40 to 248°F
• Bushings: Rubber bushings and polyurethane rebound bumper included
• Valving: Progressive Engagement Valving (PEV) with Compression Control Valve

Fits select 2015-2020 Ford F-150.

The Rancho RS5000X series shock absorber utilizes Cross Tuned technology and Progressive Engagement Valving to deliver a refined ride on-road and controlled performance off-road. Designed with a large twin-tube body, this gas-pressurized shock minimizes fluid aeration and shock fade during demanding use. The internal design features a 35mm sintered iron piston and an application-specific compression control valve to regulate fluid transfer and absorb harsh impacts without disc flutter.

• Heavy-Duty Construction: Features a 16mm nitro-carburized piston rod for superior corrosion resistance and double-welded loops at stress areas for structural integrity.
• Advanced Valving: Progressive Engagement Valving is custom-tuned to reduce initial impact at low speeds while maintaining control during aggressive maneuvers.
• Climate Resilient: All-weather fluid ensures consistent damping in extreme temperatures ranging from -40°F to 248°F.
• Gas Pressurized: Nitrogen gas charged to 150 PSI to minimize the air-to-oil mixture, reducing damping fade and foaming.
• Protection Included: Includes a polyvinyl protective boot to shield the rod and oil seal from dirt and debris.

• Manufacturer Part Number: RS55316
• Piston Diameter: 35mm
• Rod Diameter: 16mm
• Gas Pressure: 150 PSI
• Operating Temperature: -40°F to 248°F
• Bushings: Rubber with polyurethane rebound bumper

Fits select 2004-2012 Chevrolet Colorado, GMC Canyon, Isuzu i-350, and Isuzu i-370. The Rancho RS5000X RS55301 rear shock absorber is engineered to bridge the gap between street comfort and off-road capability. Featuring an advanced Progressive Engagement Valving (PEV) system, this twin-tube shock is custom-tuned to minimize initial impact harshness at low speeds while maintaining firm control during aggressive maneuvers or heavy loading.

• Precision Valving: Cross Tuned technology uses a progressive rebound valving system and an advanced compression phase to improve handling across varying terrain.
• Heavy-Duty Construction: Built with a 16mm nitro-carburized piston rod for superior corrosion resistance and a 35mm sintered iron piston for structural integrity.
• Fade Resistance: Nitrogen gas pressurized to 150 PSI reduces air-to-oil foaming, ensuring consistent damping performance under high-demand conditions.
• All-Weather Reliability: Filled with specialized fluid rated for internal temperatures ranging from -40 to 248°F.
• Ride Quality: Includes a polyurethane rebound bumper and rubber bushings to isolate road noise and vibrations, plus a fluon-banded piston for a tighter seal and smoother stroke.
• Durability Features: Double-welded loops at stress points and a polyvinyl protective boot for off-road longevity.

Each RS5000X shock absorber is backed by Rancho’s Limited Lifetime Warranty.

Fits select 2004-2012 Chevrolet Colorado, GMC Canyon, Isuzu i-350, and Isuzu i-370.

The Rancho RS5000X shock absorber series is engineered to deliver improved handling and control for light trucks and SUVs both on and off-road. Utilizing a large twin-tube body design, this front shock features Cross Tuned technology with a unique rebound valving system and Progressive Engagement Valving. This allows the shock to minimize initial impacts at low speeds while maintaining firm control during aggressive maneuvers or rough terrain.

• Durable Construction: Built with a 16mm nitro-carburized piston rod to resist corrosion and scuffs, plus a 35mm sintered iron piston for structural strength.
• Gas Pressurized: Charged with 150 PSI nitrogen gas to minimize air-to-oil foaming and prevent damping fade under heavy use.
• Weather Resistance: Filled with all-weather fluid capable of maintaining consistent performance in temperatures ranging from -40°F to 248°F.
• Optimized Sealing: Features a low-friction, self-lubricating seal that retains gas and oil for smoother compression and quicker rebound.
• Ride Comfort: Includes a polyurethane rebound bumper and rubber bushings to help isolate road harshness and vibrations.

• Series: RS5000X
• Position: Front
• Part Number: RS55300
• Internal Design: Twin-tube
• Hardware: Protective polyvinyl boot and bushings included

Fits select 1999-2018 Chevrolet Silverado and Avalanche, GMC Sierra, Dodge Ram 1500, and Hummer H2.

The Rancho RS5000X RS55297 shock absorber utilizes exclusive Cross Tuned technology and a Progressive Engagement Valving (PEV) system to provide a custom-tuned ride for trucks and SUVs. Designed to reduce initial impact at low speeds while maintaining control during aggressive maneuvers, this twin-tube shock is engineered to perform reliably both on and off-road.

• Advanced Valving: Progressive Engagement Valving is custom-tuned for each application to minimize rough rides and maintain motion control without disc flutter.
• Durable Construction: Features a 16mm nitro-carburized piston rod for superior scuff and corrosion resistance, plus double-welded loops at stress areas.
• Performance Internals: A 35mm sintered iron piston and fluon-banded seal enhance responsiveness and structural integrity.
• Fade Resistance: Nitrogen gas pressurized to 150 PSI minimizes air-to-oil mixture to reduce foaming and damping performance fade.
• Thermal Stability: Large twin-tube body filled with all-weather fluid withstands internal temperatures from -40°F to 248°F.
• Includes: Polyvinyl protective boot and rubber bushings to help absorb ride harshness.
• Part Number: RS55297

Fits select 1999-2013 Chevrolet Silverado, Suburban, and Avalanche 1500 HD/2500, and GMC Sierra and Yukon XL 1500 HD/2500 models.

The Rancho RS5000X RS55296 is a high-performance twin-tube gas shock absorber engineered to improve handling and ride quality on both factory-height and leveled trucks. Utilizing exclusive Cross Tuned technology, this shock features a unique rebound valving system and an advanced compression phase that manages vehicle motion effectively during off-road articulation or highway towing. The Progressive Engagement Valving (PEV) is custom-tuned to minimize initial impact harshness at low speeds while maintaining control during aggressive maneuvers.

Built for durability in harsh environments, the shock features a 16mm nitro-carburized piston rod to resist scuffing and corrosion, paired with double-welded loops at critical stress points. The internal 35mm sintered iron piston provides structural integrity, while the 150 PSI nitrogen gas charge reduces fluid foaming and damping fade under heavy use.

• Internal Components: 35mm sintered iron piston and 16mm nitro-carburized rod.
• Advanced Valving: Progressive Engagement Valving (PEV) and custom Compression Control Valve.
• Gas Charge: Nitrogen pressurized to 150 PSI to minimize aeration and fade.
• Operating Range: All-weather fluid designed to withstand internal temperatures from -40° to 248°F.
• Protection: Includes a polyvinyl protective boot and polyurethane rebound bumper.
• Hardware: Rubber bushings included for noise and vibration isolation.
• MPN: RS55296

Fits select 1999-2013 Chevrolet and GMC vehicles, including Silverado/Sierra 1500 HD, 2500, 2500 HD, 3500 HD, and Suburban/Yukon XL 2500. This heavy-duty front shock absorber is engineered to improve handling and performance for work and off-road applications.

The Rancho RS5000X series features a unique Cross Tuned technology that utilizes a progressive engagement valving system. This design helps minimize initial impacts at low speeds while maintaining firm control during aggressive driving or when hauling heavy loads. The large twin-tube body is filled with all-weather fluid, allowing the shock to maintain consistent damping performance in extreme temperatures ranging from -40 to 248°F.

• Manufacturer Part Number: RS55295
• Advanced Valving: Progressive Engagement Valving (PEV) and custom-tuned Compression Control Valve prevent disc flutter and ensure smooth fluid transfer.
• Rugged Construction: Features a 16mm nitro-carburized piston rod for superior corrosion resistance and a 35mm sintered iron piston for structural integrity.
• Reduced Fade: Pressurized with 150 PSI nitrogen gas to minimize aeration and foaming for consistent damping under stress.
• Enhanced Sealing: Low-friction, self-lubricating seal retains gas and oil for faster rebound and smoother compression cycles.
• Included Components: Protective polyvinyl boot, polyurethane rebound bumper, and rubber bushings to help absorb road harshness.
• Warranty: Covered by Rancho’s Limited Lifetime Warranty.

Fits select 2001-2010 Chevrolet Silverado 2500 HD, GMC Sierra 2500 HD, and Hummer H2 models.

The Rancho RS5000X gas-pressurized shock absorber is engineered to provide a significant upgrade in handling and control for heavy-duty trucks and SUVs. Utilizing Rancho's exclusive Cross Tuned technology, these shocks feature a unique valving system that manages both the rebound and compression phases to improve stability on and off-road. The twin-tube body is nitrogen-charged to 150 PSI to minimize aeration and foaming, ensuring consistent damping performance even during heavy use.

• Precision Valving: Progressive Engagement Valving is custom-tuned for each application to reduce harshness during initial low-speed impacts.
• Heavy-Duty Construction: Features a 16mm nitro-carburized piston rod for superior scuff and corrosion resistance, plus a 35mm sintered iron piston for structural integrity.
• All-Weather Performance: Filled with specialized fluid designed to maintain viscosity in internal temperatures ranging from -40 to 248°F.
• Durable Seals: Low-friction, self-lubricating seals retain gas and oil for quicker rebound and smoother compression.
• Enhanced Protection: Includes a polyvinyl protective boot and double-welded loops at high-stress mounting points.
• Specifications: 150 PSI nitrogen gas pressurized; 16mm piston rod; 35mm sintered iron piston; MPN: RS55289.

Each shock is backed by Rancho's Limited Lifetime Warranty.

Fits select 2001-2019 Chevrolet Silverado/Suburban 2500/3500, GMC Sierra/Yukon XL 2500/3500, and Hummer H2.

The Rancho RS5000X (RS55288) is a twin-tube gas-pressurized shock absorber engineered for drivers who require a balance between daily street comfort and capable off-road performance. Utilizing Rancho’s exclusive Cross Tuned technology, this shock features Progressive Engagement Valving (PEV) designed to reduce initial impact harshness at low speeds while maintaining firm control during high-speed maneuvers or when navigating rough terrain.

Built to withstand extreme environments, the RS5000X is charged with 150 PSI of nitrogen gas to minimize aeration and shock fade. The unit is constructed with a 35mm sintered iron piston and a 16mm nitro-carburized piston rod for superior structural integrity and corrosion resistance. It is finished with a durable protective boot to shield the self-lubricating seal from trail debris.

• Series: RS5000X
• MPN: RS55288
• Piston Diameter: 35mm sintered iron
• Rod Diameter: 16mm nitro-carburized steel
• Pressure: 150 PSI nitrogen gas charged
• Operating Temp: -40°F to 248°F all-weather fluid
• Construction: Double-welded loops with polyurethane rebound bumper
• Includes: Polyvinyl protective boot and rubber bushings

Fits select 2004-2025 Ford F-150 and 2006-2008 Lincoln Mark LT. The Rancho RS5000X (RS55287) is a gas-pressurized shock absorber engineered for trucks that transition between the street and the trail. At the core of the RS5000X is Rancho’s exclusive Cross Tuned technology, featuring a progressive engagement valving system that reduces initial impact harshness at low speeds while providing firm control during aggressive driving or heavy loads.

Constructed with a large 2.25-inch twin-tube body, this shock is designed for maximum fluid capacity and cooler operation in extreme environments. The internal 150 PSI nitrogen gas charge minimizes the air-to-oil mixture, effectively preventing performance fade and foaming. For long-term durability, the unit features a 16mm nitro-carburized piston rod to resist corrosion and double-welded loops at critical stress points.

• Precision Control: 35mm sintered iron piston and fluon-banded design enhance responsiveness and structural integrity.
• Extreme Temperature Resilience: All-weather fluid ensures consistent damping performance from -40 to 248°F.
• Advanced Sealing: Low-friction, self-lubricating seal maintains gas charge and oil for faster rebound and smoother compression.
• Ready for the Elements: Includes a polyvinyl protective boot to shield the rod and seals from dirt and road debris.
• Technical Specs: Nitrogen pressurized to 150 PSI; 16mm rod; polyurethane rebound bumper; rubber bushings.

Fits select 2004-2014 Ford F-150 and 2006-2008 Lincoln Mark LT.

The Rancho RS5000X series shock absorber (RS55286) features an advanced Cross Tuned technology that utilizes a unique rebound valving system and a specialized compression phase. Designed for trucks that see both highway miles and off-road trails, this twin-tube shock is pressurized with nitrogen gas to 150 PSI. This high-pressure charge minimizes air-to-oil mixture, effectively reducing damping fade and foaming during heavy cycling.

Built for the long haul, the RS55286 is constructed with a 16mm nitro-carburized piston rod for superior corrosion resistance and a 35mm sintered iron piston for structural integrity. The Progressive Engagement Valving (PEV) is custom-tuned to reduce initial impacts at low speeds, providing a smoother ride without sacrificing the control needed for larger obstacles. With a temperature operating range of -40 to 248°F, these shocks maintain consistent performance in any climate.

• Manufacturer Part Number: RS55286
• Internal Design: Twin-tube gas pressurized (150 PSI)
• Valving: Progressive Engagement Valving with Compression Control Valve
• Piston: 35mm sintered iron with fluon-banded seal
• Piston Rod: 16mm nitro-carburized rod with double-welded loops
• Bushing Material: Natural rubber bushings and polyurethane rebound bumper
• Includes: Polyvinyl protective boot
• Warranty: Rancho Limited Lifetime Warranty

Fits 2002-2012 Jeep Liberty and 2007-2011 Dodge Nitro models. This Rancho RS5000X rear shock absorber features an advanced Progressive Engagement Valving system designed to improve handling both on and off-road by reducing initial impacts and minimizing ride harshness. The twin-tube body is nitrogen-charged to 150 PSI to prevent aeration and foaming, ensuring consistent damping performance even under heavy use.

• Precision Valving: Cross-tuned technology with application-specific compression and rebound valving.
• Durable Construction: 16mm nitro-carburized piston rod and 35mm sintered iron piston provide enhanced structural integrity.
• All-Weather Performance: Filled with specialized fluid capable of withstanding internal temperatures from -40 to 248°F.
• Ride Quality: Polyurethane rebound bumper and fluon-banded piston for increased responsiveness and smoother compression.
• Installation Ready: Includes double-welded loops at stress points and a protective polyvinyl boot to shield the rod from debris.
• Manufacturer Part Number: RS55284

Fits 2002-2005 Dodge Ram 1500 (Laramie, SLT, ST) 1/2 Ton trucks.

The Rancho RS5000X series gas-pressurized shock absorber utilizes advanced Cross Tuned technology to deliver improved handling and performance both on and off-road. Featuring a unique rebound valving system and an exclusive Progressive Engagement Valving (PEV) design, this shock is custom-tuned to your specific vehicle to reduce initial impacts at low speeds and minimize ride harshness. The twin-tube body is nitrogen-charged to 150 PSI to prevent aeration and foaming, ensuring consistent damping performance even during heavy use.

• Cross Tuned Technology: Advanced compression phase and rebound valving for superior vehicle control.
• Progressive Engagement Valving: Specifically tuned to absorb high-frequency road vibrations and large impacts.
• Heavy-Duty Construction: Features a 35mm sintered iron piston and a 16mm nitro-carburized piston rod for maximum durability and corrosion resistance.
• Extreme Temperature Resilience: All-weather fluid allows for consistent operation in internal temperatures ranging from -40°F to 248°F.
• Enhanced Seal Life: Low-friction, self-lubricating seals retain gas and oil for quicker rebound and smoother compression.

• Manufacturer Part Number: RS55283
• Piston Rod Diameter: 16mm
• Piston Diameter: 35mm
• Gas Pressure: 150 PSI
• Includes: Polyvinyl protective boot and rubber bushings

Fits 2002-2008 Dodge Ram 1500 models including Laramie, SLT, Sport, SRT-10, ST, and SXT.

The Rancho RS5000X RS55281 front shock absorber features an advanced Cross Tuned technology and a unique Progressive Engagement Valving system. Designed to bridge the gap between street comfort and off-road control, this twin-tube gas-pressurized shock improves handling by reducing initial impacts at low speeds and minimizing damping fade under heavy use. The 150 PSI nitrogen gas charge works to eliminate air-to-oil foaming, ensuring consistent performance in demanding conditions.

Built for long-term durability in harsh environments, this shock is constructed with a 16mm nitro-carburized piston rod to resist corrosion and scuffs, and double-welded loops at critical stress points. The self-lubricating seal and all-weather fluid allow the unit to withstand internal temperatures ranging from -40 to 248°F, making it a reliable choice for any climate.

• Manufacturer Part Number: RS55281
• Piston Rod: 16mm nitro-carburized rod for structural strength
• Piston: 35mm sintered iron piston for enhanced integrity
• Valving: Progressive Engagement Valving (PEV) for custom-tuned control
• Body Design: Twin-tube with 150 PSI nitrogen gas pressure
• Included Hardware: Polyvinyl protective boot and rubber bushings
• Operating Range: Rated for temperatures between -40 and 248°F
• Warranty: Rancho Limited Lifetime Warranty

Fits select 2003-2013 Dodge and Ram 1500, 2500, and 3500 trucks.

The Rancho RS5000X RS55279 front shock absorber uses an advanced Cross Tuned technology to bridge the gap between on-road comfort and off-road control. Built with a large twin-tube body for increased fluid capacity, this shock is designed to maintain consistent internal temperatures ranging from -40 to 248°F. The Progressive Engagement Valving is custom-tuned for heavy-duty truck applications to minimize harshness at low speeds while providing the stability required for higher-velocity impacts.

Durability is handled by a 16mm nitro-carburized piston rod that resists scuffing and corrosion, paired with double-welded loops at critical stress points. Inside, a 35mm sintered iron piston provides structural integrity while the 150 PSI nitrogen gas charge effectively reduces aeration and damping fade during aggressive driving. Each shock includes a polyvinyl protective boot to shield the rod and oil seal from trail debris and road salt.

• Precision Valving: Cross Tuned technology and Progressive Engagement Valving for better handling on and off-road.
• Heavy-Duty Build: 16mm nitro-carburized piston rod and 35mm sintered iron piston for maximum strength.
• Fade Resistance: Pressurized nitrogen gas at 150 PSI minimizes fluid foaming and damping loss.
• All-Weather Performance: Specialized fluid and twin-tube design ensure consistent operation in extreme temperatures.
• Mounting Hardware: Includes polyurethane rebound bumper and rubber bushings to absorb ride harshness.
• Part Number: RS55279

Fits select 1994-2014 Chevrolet Avalanche, Silverado, Suburban, and Tahoe; GMC Sierra and Yukon; and Dodge/Ram 1500, 2500, and 3500 trucks and SUVs. This Rancho RS5000X gas-pressurized shock absorber (RS55274) is engineered to provide improved handling and control for both on-road and off-road driving.

Featuring Rancho’s exclusive Cross Tuned technology, this twin-tube shock uses a unique Progressive Engagement Valving system to reduce initial impact harshness at low speeds while maintaining firm control during high-speed maneuvers. The large twin-tube body is filled with all-weather fluid to ensure consistent damping performance in extreme temperatures ranging from -40°F to 248°F.

• Construction: 16mm nitro-carburized piston rod for superior scuff and corrosion resistance.
• Internal Design: 35mm sintered iron piston with a fluon-banded seal for enhanced structural integrity and responsiveness.
• Pressure: Nitrogen gas pressurized to 150 PSI to minimize aeration and foaming, effectively reducing damping fade.
• Durability: Double-welded loops at stress points and a polyvinyl protective boot for long-term reliability.
• Ride Quality: Polyurethane rebound bumpers and rubber bushings absorb road vibrations and harshness.
• Warranty: Covered by Rancho’s Limited Lifetime Warranty.

Fits 1999-2004 Ford F-250 and F-350 Super Duty pickup trucks across all submodels, including Lariat, XL, XLT, King Ranch, and Harley-Davidson editions.

The Rancho RS5000X RS55273 rear shock absorber is engineered to deliver improved handling and control for heavy-duty applications. Built with a large 2.25-inch twin-tube body, this shock utilizes an application-specific piston and Rancho’s exclusive Progressive Engagement Valving (PEV) system. This custom-tuned valving helps reduce harshness during initial low-speed impacts while maintaining firm control on rough terrain and off-road conditions.

Designed for durability in extreme environments, the RS55273 is filled with all-weather fluid capable of resisting internal temperatures from -40 to 248°F. The system is nitrogen-pressurized to 150 PSI, which minimizes air-to-oil mixture to prevent foaming and damping fade. Each shock features a 16mm nitro-carburized piston rod for enhanced corrosion resistance and double-welded loops at high-stress areas for long-term structural integrity.

• Precision Control: 35mm sintered iron piston and fluon-banded piston design for smooth, responsive fluid transfer.
• Heavy-Duty Build: 16mm nitro-carburized rod resists scuffs and corrosion better than standard chrome.
• Temperature Stable: Twin-tube body and all-weather fluid ensure consistent performance in extreme heat or cold.
• Internal Protection: Polyurethane rebound bumper and rubber bushings help absorb ride harshness.
• Complete Kit: Includes a durable polyvinyl protective boot to keep debris away from the seal and rod.
• Manufacturer Part Number: RS55273

Fits select 1992-2026 Ford E-150, E-250, Excursion, and F-250/F-350 Super Duty trucks and vans.

The Rancho RS5000X series (RS55272) is a heavy-duty, gas-pressurized twin-tube shock absorber designed to bridge the gap between street comfort and off-road control. Built with Rancho’s exclusive Cross Tuned technology, these shocks feature a unique rebound valving system and advanced compression phase that significantly improves vehicle handling. The Progressive Engagement Valving is specifically tuned for Ford suspension geometry to reduce initial impact harshness at low speeds while maintaining firm control on rough terrain.

• Robust Construction: Features a 16mm nitro-carburized piston rod for superior scuff and corrosion resistance and a 35mm sintered iron piston for structural integrity.
• Advanced Valving: Nitrogen gas pressurized to 150 PSI to minimize oil foaming and damping fade during high-cycle operation.
• Temperature Resistance: Large twin-tube body filled with all-weather fluid capable of withstanding internal temperatures from -40°F to 248°F.
• Refined Ride: Polyurethane rebound bumpers and rubber bushings absorb harsh road vibrations, while the fluon-banded piston ensures consistent responsiveness.
• Installation Protection: Includes a polyvinyl protective boot to shield the seal and piston rod from road debris and moisture.
• Part Number: RS55272
• Warranty: Supported by Rancho’s Limited Lifetime Warranty.

Fits select 1999-2025 Chevrolet Silverado 1500, GMC Sierra 1500, Dodge/Ram 1500-3500, and Hummer H2.

The Rancho RS5000X RS55269 rear shock absorber utilizes patented Cross Tuned technology to provide improved handling and performance both on and off-road. Engineered with a large twin-tube body, this shock is pressurized to 150 PSI with nitrogen gas to minimize air-to-oil mixture, effectively reducing damping fade and foaming. The application-specific Progressive Engagement Valving (PEV) is custom-tuned to minimize rough rides by reducing initial impacts at low speeds while maintaining firm control during heavy suspension cycling.

• Rugged Construction: Built with a 16mm nitro-carburized piston rod to resist scuffs and corrosion, and a 35mm sintered iron piston for enhanced structural integrity.
• Advanced Sealing: Low-friction, self-lubricating seals retain gas and oil for quicker rebound and smoother compression cycles.
• Extreme Temperature Range: Filled with all-weather fluid to withstand internal operating temperatures from -40°F to 248°F.
• Durable Mounts: Features double-welded loops at stress areas and includes rubber bushings to help absorb ride harshness.
• Specifications: 150 PSI nitrogen gas charged; twin-tube design; 16mm rod; 35mm piston; includes red polyvinyl protective boot; MPN RS55269.

Fits select 1999-2007 Chevrolet Silverado/Suburban/Tahoe/Avalanche 1500 and GMC Sierra/Yukon/Yukon XL 1500 models.

The Rancho RS5000X front shock absorber utilizes a specialized Cross Tuned technology with a unique rebound valving system and advanced compression phase to improve handling both on and off-road. Designed to minimize ride harshness, the RS5000X features Progressive Engagement Valving that is custom-tuned to each vehicle application to reduce initial impacts at low speeds while maintaining control during aggressive maneuvers.

Built for durability in extreme environments, this twin-tube shock features a 16mm nitro-carburized piston rod to resist corrosion and a 35mm sintered iron piston for structural integrity. The unit is pressurized with nitrogen gas to 150 PSI to minimize aeration and foaming, ensuring consistent damping performance under heavy use.

• Manufacturer Part Number: RS55268
• Construction: Large twin-tube body with 16mm nitro-carburized piston rod
• Internal Valving: Progressive Engagement Valving and Compression Control Valve
• Gas Charge: Nitrogen gas pressurized to 150 PSI to reduce fade
• Temperature Range: All-weather fluid rated for -40°F to 248°F
• Included Hardware: Polyurethane rebound bumper, rubber bushings, and polyvinyl protective boot
• Piston: 35mm sintered iron piston with fluon-banded seal

Fits select 1999-2004 Ford F-250/F-350 Super Duty and 2000-2005 Ford Excursion. This Rancho RS5000X front shock absorber is engineered to provide a significant upgrade over factory damping, utilizing a larger twin-tube body and exclusive Progressive Engagement Valving (PEV). By custom-tuning the compression and rebound phases specifically for heavy-duty Ford chassis, this shock minimizes initial harshness at low speeds while maintaining firm control during high-speed impacts or off-road excursions.

Built for durability in extreme environments, the RS55267 features a nitro-carburized 16mm piston rod and a 35mm sintered iron piston. The internal nitrogen gas charge is pressurized to 150 PSI to prevent oil foaming and damping fade during heavy use. To protect internal components, each shock includes a polyvinyl dust boot and utilizes all-weather fluid capable of operating between -40 and 248°F.

• MPN: RS55267
• Piston Rod: 16mm nitro-carburized for scuff and corrosion resistance
• Piston: 35mm sintered iron for structural integrity
• Gas Charge: 150 PSI nitrogen pressurized to reduce damping fade
• Valving: Progressive Engagement Valving (PEV) for custom-tuned control
• Construction: Double-welded loops and self-lubricating seals
• Bushings: Natural rubber bushings and polyurethane rebound bumper for noise isolation
• Included: Polyvinyl protective boot

Fits select 1999-2007 Chevrolet and GMC trucks and SUVs, including Silverado/Sierra 1500, Tahoe/Yukon, Suburban/Yukon XL 1500, and Avalanche 1500.

The Rancho RS5000X series shock absorber (MPN RS55265) utilizes advanced Cross Tuned technology and Progressive Engagement Valving (PEV) to bridge the gap between street comfort and off-road control. This nitrogen-gas charged twin-tube shock is pressurized to 150 PSI to minimize aeration and foaming, ensuring consistent damping performance and reduced fade during intensive use. Designed for durability and precision, the application-specific piston is custom-tuned to regulate fluid transfer and absorb impacts without disc flutter.

• Cross Tuned Technology: Features a unique rebound valving system and advanced compression phase for improved handling on and off-road.
• Heavy-Duty Construction: Engineered with a 16mm nitro-carburized piston rod to resist scuffs and corrosion, plus double-welded loops at high-stress areas.
• Precision Piston: A 35mm sintered iron piston and fluon-banded seal deliver enhanced structural integrity and consistent responsiveness to changing road conditions.
• Temperature Resilience: Large twin-tube body filled with all-weather fluid capable of withstanding internal temperatures from -40°F to 248°F.
• Ride Harshness Mitigation: Includes polyurethane rebound bumpers and rubber bushings to help absorb road noise and vibration.
• Protection Included: Ships with a polyvinyl protective boot to shield the piston rod from debris and contaminants.

Each RS55265 unit is built as a direct-fit replacement for the OE front shock and is backed by Rancho’s Limited Lifetime Warranty.