PowerStop AR85139EVC Disc Brake Rotor - Rear

Power Stop Rear Genuine Geomet Coated Rotor Overview

The Power Stop - Rear Genuine Geomet Coated Rotor (Part Number AR85139EVC) is engineered for reliable braking performance and corrosion resistance. Designed as a vented disc brake rotor, it offers consistent stopping power for compatible rear brake systems on various vehicle makes and models.

• Full cast construction for durability and strength
• Geomet rust-resistant coating to prevent corrosion
• Vented rotor design for improved heat dissipation
• Nominal thickness of 42.0 mm with discard thickness at 40.4 mm
• Outside diameter of 345.0 mm (13.6 inches) for precise fitment
• Mounting bolt hole circle diameter of 145.0 mm with 8 lug holes
• Smooth surface type for consistent brake pad contact
• Standard replacement grade type rotor

Product Line Details: Power Stop - Rear Genuine Geomet Coated Rotor

This rotor is part of the Power Stop - Rear Genuine Geomet Coated Rotor line, which focuses on providing OEM-quality replacement rotors with enhanced corrosion protection. The Geomet coating applied to these rotors helps extend service life by resisting rust and environmental damage, making them suitable for vehicles operating in varied climates. This product line is designed to meet or exceed factory specifications for rear disc brake rotors.

Technical Specifications and Features

The AR85139EVC rotor features a full cast construction that ensures structural integrity under braking stress. Its vented design promotes efficient heat dissipation, reducing the risk of brake fade during extended use. The rotor measures 345.0 mm in outside diameter and 42.0 mm in nominal thickness, with a discard thickness of 40.4 mm, indicating when replacement is necessary. The smooth surface finish provides consistent pad contact, while the rust-resistant Geomet coating protects against corrosion. The mounting bolt hole circle diameter is 145.0 mm, accommodating 8 lug holes for secure installation.

Common Applications and Problem Solving

• Replacement for worn or warped rear disc brake rotors
• Addresses brake noise caused by uneven rotor surfaces
• Prevents rust-related rotor degradation in humid or salty environments
• Improves braking consistency by reducing heat-related fade
• Restores proper rotor thickness for safe braking performance

Installation Notes and Tips

Ensure the rotor is compatible with your vehicle’s rear brake system by verifying bolt pattern and dimensions. Clean the hub surface before installation to prevent runout. Use proper torque specifications on mounting bolts to avoid rotor warping. Since this rotor does not include an ABS tone ring, confirm your vehicle’s ABS sensor compatibility. Always inspect brake pads and hardware during rotor replacement for optimal performance.

Quality Assurance and Warranty

Power Stop rotors are manufactured to meet industry standards for durability and performance. The Geomet coating provides additional protection against corrosion, extending rotor life. While specific warranty details for part number AR85139EVC are not provided, Power Stop products typically come with a limited warranty against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.