PowerStop JBR1157EVC Disc Brake Rotor - Front

Power Stop Front Genuine Geomet Coated Rotor Overview

The Power Stop - Front Genuine Geomet Coated Rotor (Part Number JBR1157EVC) is engineered for Mazda MX-5 Miata models requiring reliable front disc brake rotors. Designed with a rust-resistant Geomet coating and vented construction, this rotor supports consistent braking performance and durability.

• Compatible with Mazda MX-5 Miata front brake system
• Vented disc brake rotor design for improved heat dissipation
• Rust resistant Geomet coating to reduce corrosion
• Nominal thickness of 0.87 inches (22.00 mm) with a discard thickness of 0.79 inches (20.00 mm)
• Overall height of 1.80 inches (45.00 mm) and outside diameter of 11.40 inches (290.00 mm)
• Mounting bolt hole circle diameter of 4.50 inches (114.30 mm) with 5 lug holes

Detailed Rotor Specifications and Features

This Power Stop rotor features a vented design that enhances cooling during braking, helping to maintain consistent stopping power and reduce brake fade. The Geomet coating provides a protective layer against rust and corrosion, extending the rotor's service life especially in environments prone to moisture and road salt. The rotor's nominal thickness is 0.87 inches (22.00 mm), with a discard thickness of 0.79 inches (20.00 mm), ensuring clear limits for safe use and replacement. Its overall height measures 1.80 inches (45.00 mm), and the outside diameter is 11.40 inches (290.00 mm), matching the precise fitment requirements for the Mazda MX-5 Miata front brakes. The mounting bolt hole circle diameter is 4.50 inches (114.30 mm) with 5 lug holes, ensuring secure installation.

About the Power Stop - Front Genuine Geomet Coated Rotor Line

The Power Stop - Front Genuine Geomet Coated Rotor product line focuses on providing rotors with a factory-style Geomet coating that offers enhanced corrosion resistance without compromising braking performance. This line is designed to meet or exceed OEM specifications, making it a suitable replacement for front disc brake rotors on vehicles like the Mazda MX-5 Miata. The vented rotor design within this line supports effective heat dissipation, which is critical for maintaining brake system reliability under normal driving conditions.

Common Applications and Problem Solving

• Replacement for worn or warped front disc brake rotors on Mazda MX-5 Miata
• Addresses brake noise and vibration caused by uneven rotor surfaces
• Helps prevent rust buildup that can lead to rotor pitting and reduced braking efficiency
• Improves heat dissipation to reduce brake fade during extended use
• Restores proper rotor thickness for safe braking performance

Installation Notes and Tips

When installing the Power Stop JBR1157EVC rotor, ensure the mounting surface is clean and free of debris to promote proper rotor seating. Verify the rotor thickness before installation to confirm it meets the nominal thickness of 0.87 inches (22.00 mm) and is above the discard thickness of 0.79 inches (20.00 mm). Use the correct torque specifications for the 5 lug bolts on the 4.50 inch (114.30 mm) bolt circle diameter to avoid rotor warping. It is recommended to replace brake pads simultaneously to ensure optimal braking performance.

Quality Assurance and Warranty

Power Stop rotors are manufactured to meet OEM standards for fit, form, and function. The Geomet coating provides additional protection against corrosion, contributing to the rotor's longevity. While specific warranty details are not provided, Power Stop products typically come with a limited warranty against defects in materials and workmanship. Always consult product documentation or manufacturer resources for complete warranty information.