Raybestos 66789R Disc Brake Rotor - Front

Overview of Raybestos R-Line Disc Brake Rotor 66789R

The Raybestos R-Line Disc Brake Rotor 66789R is engineered for reliable braking performance on Ford F-250 and F-350 trucks. Designed as a solid, conventional rotor, it meets the specific requirements of these heavy-duty vehicles, ensuring consistent stopping power and durability.

• Compatible with Ford F-250 and F-350 models
• Solid disc brake rotor with conventional design
• Outside diameter: 12.950 inches (328.95 mm)
• Nominal thickness: 1.185 inches (30.1 mm)
• Discard thickness: 1.122 inches (28.5 mm)
• Overall height: 3.110 inches (79 mm)
• Mounting bolt hole quantity: 8 with 0.645 inch (16.4 mm) diameter
• Center hole diameter: 5.130 inches (130.3 mm)
• Mounting bolt hole circle diameter: 6.500 inches (165.1 mm)

Detailed Product Specifications

This Raybestos R-Line rotor (part number 66789R) is a solid, conventional disc brake rotor designed specifically for Ford F-250 and F-350 trucks. The rotor features an outside diameter of 12.950 inches, providing the necessary surface area for effective braking. Its nominal thickness of 1.185 inches ensures structural integrity and heat dissipation, while the discard thickness of 1.122 inches indicates the minimum safe thickness before replacement is required. The overall height of 3.110 inches accommodates proper fitment within the brake assembly. With eight mounting bolt holes and a bolt circle diameter of 6.500 inches, this rotor aligns precisely with the vehicle’s hub. The center hole diameter of 5.130 inches allows for secure mounting and proper rotor positioning.

Raybestos R-Line Product Line

The R-Line by Raybestos is a product line focused on delivering dependable brake components that meet OEM specifications. This line emphasizes quality materials and precise manufacturing tolerances to ensure consistent performance and fitment. The 66789R rotor exemplifies the R-Line’s commitment to providing parts that maintain vehicle safety and braking efficiency for Ford trucks.

Applications and Problem Solving

• Replacement for worn or warped rotors on Ford F-250 and F-350
• Addresses brake pulsation caused by uneven rotor surfaces
• Restores proper braking performance and pedal feel
• Prevents brake fade due to rotor overheating
• Ensures safe stopping distances under heavy load conditions

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it exceeds discard thickness
• Clean mounting surfaces to prevent rotor runout and vibration
• Torque mounting bolts to manufacturer specifications for secure fitment
• Inspect brake pads and hardware during rotor replacement for optimal performance
• Perform a bed-in procedure after installation to maximize rotor and pad life

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. The 66789R rotor undergoes rigorous quality control processes to maintain consistent dimensions and material integrity. While specific warranty details may vary, Raybestos typically offers coverage against defects in materials and workmanship, providing confidence in the product’s longevity and safety.