Raybestos 66576R Disc Brake Rotor - Front

Overview of Raybestos R-Line Disc Brake Rotor 66576R

The Raybestos R-Line Disc Brake Rotor 66576R is engineered for reliable braking performance on select Ford, Mazda, and Mercury vehicles. Designed as a vented, conventional rotor, it offers precise fitment for models like the Ford Explorer, Ranger, and Mazda B3000.

• Vented disc brake rotor for improved heat dissipation
• Nominal thickness of 1.025 inches (26.050 mm) with discard thickness at 0.965 inches (24.500 mm)
• Overall height measures 2.590 inches (65.800 mm)
• Outside diameter of 11.260 inches (286.000 mm)
• Five mounting bolt holes with a 114.3 mm (4.500 inch) bolt circle diameter
• Center hole diameter of 2.837 inches (72.050 mm)
• Compatible with Ford, Mazda, and Mercury models including B3000, B4000, Explorer, Mountaineer, and Ranger

Raybestos R-Line Product Line Details

The R-Line by Raybestos focuses on delivering dependable brake components that meet or exceed OEM specifications. This disc brake rotor 66576R is part of the R-Line series, which emphasizes consistent manufacturing quality and precise fitment for a range of domestic and import vehicles. The R-Line rotors are designed to provide stable braking performance under normal driving conditions, making them suitable for daily use on compatible Ford, Mazda, and Mercury trucks and SUVs.

Technical Specifications and Features

This vented rotor design enhances cooling efficiency, reducing the risk of brake fade during extended use. The nominal thickness of 1.025 inches ensures durability, while the discard thickness of 0.965 inches indicates the minimum safe thickness before replacement is necessary. The rotor’s overall height of 2.590 inches and outside diameter of 11.260 inches align with factory dimensions for proper installation and operation. The five mounting bolt holes and 114.3 mm bolt circle diameter provide secure attachment to the hub assembly.

Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing reduced braking efficiency due to rotor thickness below discard limits
• Resolving noise or vibration issues linked to damaged or uneven rotors
• Upgrading to a vented rotor for improved heat dissipation on Ford Explorer or Mazda B3000
• Ensuring proper fitment on vehicles requiring a 5-lug, 11.260-inch diameter rotor

Installation Notes and Tips

Before installation, verify rotor dimensions against the vehicle’s OEM specifications. Clean the rotor surface to remove any protective coating or debris. Use proper torque specifications on mounting bolts to avoid rotor warping. It is recommended to replace brake pads simultaneously to ensure optimal braking performance. Check for hub surface cleanliness and absence of rust to ensure proper rotor seating.

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet industry standards for durability and performance. The 66576R rotor undergoes quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details may vary, Raybestos typically offers coverage against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.