Monroe 557045 | Suspension Shock Absorber

Part Number
Magnum RV Shock Absorber
Special Price $70.54 Regular Price $82.99
In stock
Only 8 left
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Estimated Ship Date: 1 Business Day or Less
The Monroe® Magnum™ RV shock absorber utilizes advanced technology, combining a gas charge and full displaced valving for superior RV performance.

BRAND: Monroe Shocks & Struts


  • Magnum RV Shock Absorber
  • .05-inch Pressure tube withstanding pressure of 9KPSI
  • Nitrogen gas-charged: For improved ride and handling, helps maintain tire to road contact by reducing aeration - on most applications
  • Loop welding technique: Resistance weld with additional 360-degree weld to provide up to 15,000 lbs. (6,804 kg) tensile strength for maximum durability - when required
  • Robust hydraulic lock-out: Prevents over-extension of the suspension, top-out of the piston and averts damage to the seal assembly
  • Magnum RV Shock Absorber
  • Monroe Shocks & Struts Magnum RV 557045 Shock Absorber
  • 1-3/8-inch (35 mm) or 1-3/4-inch (44.6 mm) bore: The 1-3/8' (555xx Series) or 1-3/4" (557xx Series) bore is larger than most shocks to provide more efficient and consistent control - when required
  • All weather fluid: Contains special modifiers to reduce frictions and ensure smooth rod reaction
  • PTFE coated bearing: Reduces friction during operation between the rod and rod guide, improving durability
  • Tenneco shouldered bushings: Shouldered bushing and bonded bushing with sleeve designs prevent (bushing walkout) for improved quality and durability - on most applications
  • 2-inch (50.8 mm) or 2-3/8-inch (60.3 mm) reserve tube: The 2" (555xx Series) or 2-3/8' (557xx Series) reserve tube holds more fluid or more consistent performance - when required


Compressed Bumper StopNo
Compressed Length14.4300
Dust ShieldYes
Dust Shield IncludedYes
Extended Bumper StopNo
Extended Hydraulic LockoutYes
Extended Length23.3900
Lower Mounting CodeLS39
Lower Mounting DescriptionLoop Bushing & Sleeve Mount - 1/2" Sleeve ID X 1.5/8" Sleeve OAL
Parts PackP01167
Travel Length8.9600
Upper Mounting CodeS5
Upper Mounting DescriptionStem Mount - 2.5/8" Stem Length X 1/2"-13 Thread Pitch



  • Roadmaster: 1809928
  • Roadmaster: 557035
Customer Questions
How often should shock absorbers be replaced?
Shock absorbers should generally be replaced every 50,000 miles or every 5-7 years
How to replace shock absorbers?
To replace shock absorbers, you need to remove the wheel and tire assembly, unbolt the old shock absorber, replace it with a new one, and tighten the bolts. Then, reinstall the wheel and tire, and test the new shocks.
Why do shock absorbers leak?
Shock absorbers can leak due to worn seals, damage to the piston or cylinder, or corrosion from exposure to moisture and road salt.
Can shock absorbers be replaced?
Yes, shock absorbers can be replaced when they start to wear out or fail.
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