Raybestos 66557R Disc Brake Rotor and Hub Assembly - Front

Overview of Raybestos R-Line Disc Brake Rotor and Hub Assembly

The Raybestos R-Line 66557R disc brake rotor and hub assembly is engineered for reliable braking performance on select Ford and Mazda trucks. Designed specifically for models like the Ford Ranger and Mazda B-series trucks, this assembly ensures proper fitment and consistent stopping power.

• Compatible with Ford Ranger, Mazda B2300, B3000, and B4000 models
• Includes disc brake rotor and hub assembly in one unit
• Mounting bolt hole quantity: 5 with a 114.3 mm bolt circle diameter
• Nominal rotor thickness: 1.025 inches (26.05 mm)
• Discard thickness: 0.965 inches (24.5 mm)
• Mounting bolt hole diameter: 0.54 inches (13.7 mm)
• Stud/lug hole quantity: 5

Detailed Product Specifications

This Raybestos R-Line disc brake rotor and hub assembly (part number 66557R) is designed to meet the precise specifications required for proper braking function on Ford Ranger and Mazda B-series trucks. The rotor features a nominal thickness of 1.025 inches (26.05 mm), ensuring adequate material for heat dissipation and wear resistance. The discard thickness is set at 0.965 inches (24.5 mm), indicating the minimum safe thickness before replacement is necessary. The assembly includes five mounting bolt holes arranged on a 114.3 mm bolt circle diameter, with each hole measuring 0.54 inches (13.7 mm) in diameter. This configuration matches the factory specifications for secure installation and alignment.

R-Line Product Line Information

The Raybestos R-Line product line focuses on delivering reliable, OE-quality brake components designed for direct fit applications. This line emphasizes durability and consistent performance, making it suitable for replacement parts on vehicles like the Ford Ranger and Mazda B-series trucks. The 66557R rotor and hub assembly is part of this line, providing a balance of quality and value for professional repairs and maintenance.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing excessive rotor thickness wear beyond discard limits
• Resolving hub assembly issues such as noise or vibration during braking
• Upgrading to a complete rotor and hub assembly for simplified installation
• Ensuring proper fitment on Ford Ranger and Mazda B2300, B3000, B4000 models

Installation Notes and Tips

When installing the Raybestos R-Line 66557R disc brake rotor and hub assembly, ensure the mounting surface is clean and free of debris to maintain proper alignment. Torque the five mounting bolts to the manufacturer’s specifications to avoid uneven wear or vibration. It is recommended to inspect wheel bearings and replace if necessary during installation. Properly bleeding the brake system after installation will help maintain optimal braking performance.

Quality Assurance and Warranty

Raybestos R-Line brake components are manufactured to meet or exceed industry standards for safety and durability. While specific warranty details for part number 66557R should be confirmed with the supplier, Raybestos typically offers limited warranties covering defects in materials and workmanship. This ensures confidence in the product’s reliability for Ford Ranger and Mazda B-series truck owners.