PowerStop AR85139 Disc Brake Rotor - Rear

Power Stop Rear OE Stock Replacement Brake Rotor Overview

The Power Stop - Rear OE Stock Replacement Brake Rotor (Part Number AR85139) is engineered to meet original equipment specifications for reliable braking performance. Designed as a vented disc brake rotor, it offers consistent heat dissipation and durability for rear brake applications on compatible vehicles.

• Part Number: AR85139
• Type: Vented Disc Brake Rotor
• Outside Diameter: 345.00 mm (13.60 inches)
• Nominal Thickness: 42.00 mm (1.65 inches)
• Discard Thickness: 40.40 mm (1.59 inches)
• Overall Height: 116.70 mm (4.60 inches)
• Mounting Bolt Hole Circle Diameter: 145.00 mm (5.70 inches)
• Stud/Lug Hole Quantity: 8
• Rust Resistant Coating: No

About the Power Stop - Rear OE Stock Replacement Brake Rotor Line

The Power Stop - Rear OE Stock Replacement Brake Rotor line is designed to provide a direct replacement for factory rear brake rotors. This product line focuses on matching original equipment dimensions and performance characteristics, ensuring compatibility and consistent braking feel. The AR85139 rotor maintains OE specifications for thickness, diameter, and mounting, making it suitable for vehicles requiring precise fitment and reliable stopping power.

Detailed Product Description

This vented disc brake rotor features an outside diameter of 345 mm (13.60 inches) and a nominal thickness of 42 mm (1.65 inches), with a discard thickness of 40.40 mm (1.59 inches). The vented design helps dissipate heat more effectively than solid rotors, reducing the risk of brake fade during extended use. The rotor’s overall height measures 116.70 mm (4.60 inches), and it includes eight stud/lug holes arranged on a 145 mm (5.70 inches) bolt circle diameter, ensuring proper fitment on compatible rear brake assemblies. Note that this rotor does not include a rust resistant coating, so proper maintenance is recommended to prevent corrosion over time.

Common Applications and Issues Addressed

• Replacement for worn or warped rear brake rotors
• Restores braking performance on vehicles experiencing brake pulsation or noise
• Addresses rotor thickness below manufacturer discard limits
• Suitable for vehicles requiring vented rear rotors for heat management
• Compatible with rear brake systems needing an 8-lug rotor with 145 mm bolt circle

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 40.40 mm before installation. Clean the rotor surface and hub mounting area to remove rust and debris for proper seating. Verify the 8-lug hole pattern and 145 mm bolt circle diameter match the vehicle’s rear brake assembly. Use proper torque specifications for lug nuts to avoid rotor warping. Since this rotor does not have a rust resistant coating, consider applying anti-seize compound on the hub to minimize corrosion.

Quality Assurance and Warranty

Power Stop manufactures this rotor to meet or exceed original equipment standards for fit, form, and function. While specific warranty details are not provided, Power Stop products typically undergo rigorous quality control to ensure durability and consistent braking performance. Refer to Power Stop’s official documentation for warranty terms related to the AR85139 rotor.