PowerStop AR85121 Disc Brake Rotor - Rear

Rear OE Replacement Rotor

Power Stop Autospecialty brake rotors are built as a direct-fit replacement for original equipment fit and performance. This rear disc brake rotor is engineered for heavy-duty applications and matches the dimensions needed for proper brake service on Ram 4500 and Ram 5500 trucks.

Key Features

• Direct-fit rear brake rotor for OE-style replacement service.
• Vented rotor design for improved heat management.
• 15.40 in. outside diameter with 10 lug holes.
• Matches the specified thickness and bolt circle dimensions for correct fitment.
• Power Stop Autospecialty line for stock replacement brake service.

Detailed Description

Power Stop AR85121 is a rear disc brake rotor designed for Ram 4500 and Ram 5500 applications, including 2008-2010 Dodge Ram 4500 and Ram 5500 and 2011-2026 Ram 4500 and Ram 5500. The vented construction, 390.10 mm outside diameter, and 163.00 mm bolt circle diameter support proper rotor fit and brake system alignment. As part of the Power Stop Autospecialty line, AR85121 focuses on OE stock replacement requirements for rear brake service.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Replacing a worn rear brake rotor with an OE-style direct-fit part.
• Addressing brake pulsation caused by rotor wear or thickness variation.
• Restoring proper braking surface contact during brake service.
• Correcting rotor-related noise or vibration from an out-of-spec disc.

Installation Notes and Tips

Verify rear axle fitment, bolt circle diameter, and rotor dimensions before installation. Compare the old rotor to the new unit for outside diameter, overall height, and lug-hole count to confirm application match. Follow standard brake service procedures and inspect related brake components during replacement.

Quality Assurance

Power Stop positions this rotor as an OE-fit replacement within its Autospecialty brake line, with dimensions and construction intended to match original equipment requirements.