Parking Brake Strut

What Is a Parking Brake Strut?

The parking brake strut — sometimes called a spreader bar or adjuster strut — is a critical piece of hardware found inside drum brake assemblies on the rear wheels of many vehicles. When you engage the parking brake, the strut transfers force from the parking brake lever to both brake shoes, spreading them outward against the drum to hold the vehicle stationary. Without a functioning strut, the parking brake system loses its mechanical leverage and the vehicle may not hold on inclines, creating a serious safety hazard.

Why Parking Brake Struts Matter

Because they operate under constant tension and are exposed to the heat, moisture, and road grime that accumulate inside a brake drum, parking brake struts are susceptible to corrosion, bending, and wear over time. A damaged or seized strut can also interfere with the automatic self-adjustment that many drum brake systems rely on — meaning worn brake shoes may not be compensated for, leading to a spongy pedal feel or reduced stopping power. Inspecting and replacing parking brake struts as part of a routine brake service is a straightforward way to maintain both parking and dynamic braking performance.

When to Replace a Parking Brake Strut

Common signs that a parking brake strut needs attention include:

• The parking brake lever travels higher than usual before engaging
• The vehicle rolls or creeps when the parking brake is applied on a slope
• Visible rust, corrosion, or deformation on the strut when the drum is removed
• Difficulty adjusting brake shoes to the correct clearance
• A rattling or knocking noise from the rear drum area

Parking brake struts are typically replaced in axle pairs to ensure even braking force on both sides. Always inspect the associated hardware — including return springs, hold-down clips, and the parking brake cable — whenever you replace the strut.

Top Brands for Parking Brake Struts

Raybestos is one of the most respected names in brake hardware, with a long history of manufacturing friction and hardware components to stringent quality standards. Their parking brake struts are engineered to match OE specifications for fit, finish, and corrosion resistance, making them a reliable choice for professional technicians and DIY enthusiasts alike.

Mopar Performance brings factory-level engineering to Chrysler, Dodge, Jeep, and Ram applications. For owners of Stellantis-family vehicles who want parking brake hardware that matches the original design intent, Mopar Performance parts offer confidence in fit and long-term durability.

Shopping Tips

When selecting a parking brake strut, always verify compatibility using your vehicle's year, make, model, and trim level — strut lengths and attachment designs vary significantly between applications. Look for components made from corrosion-resistant materials or with a protective coating if you drive in regions where road salt is common. Purchasing a complete hardware kit, when available, is often the most cost-effective approach and ensures all wear items are refreshed at once.