Raybestos 66798R Disc Brake Rotor - Front

Overview of Raybestos R-Line Disc Brake Rotor 66798R

The Raybestos R-Line Disc Brake Rotor 66798R is engineered for reliable braking performance on Ford F-250 Super Duty and F-350 Super Duty trucks. Designed as a vented, conventional rotor, it offers precise fitment and durability for heavy-duty applications.

• Compatible with Ford F-250 Super Duty and F-350 Super Duty models
• Vented disc brake rotor design for improved heat dissipation
• Overall height: 3.660 inches (92.950 mm)
• Outside diameter: 14.530 inches (369.050 mm)
• Nominal thickness: 1.495 inches (37.950 mm)
• Discard thickness: 1.417 inches (36.000 mm)
• Mounting bolt hole quantity: 8 with 0.636 inch (16.150 mm) diameter holes
• Center hole diameter: 5.085 inches (129.150 mm)
• Mounting bolt hole circle diameter: 6.693 inches (170.000 mm)
• Stud/lug hole quantity: 8

Raybestos R-Line Product Line Details

The R-Line by Raybestos focuses on delivering dependable brake components tailored for heavy-duty and commercial vehicles. This product line emphasizes precise engineering and consistent manufacturing standards, ensuring that the 66798R disc brake rotor meets the rigorous demands of Ford Super Duty trucks. The R-Line rotors are designed to maintain structural integrity under high stress and provide consistent braking performance over time.

Technical Specifications and Features

This disc brake rotor is a vented type, which enhances cooling by allowing air to flow between the rotor surfaces, reducing the risk of brake fade during extended use. The nominal thickness of 1.495 inches (37.950 mm) ensures sufficient material for durability, while the discard thickness of 1.417 inches (36.000 mm) indicates the minimum safe thickness before replacement is necessary. The rotor’s overall height and outside diameter are engineered to match the exact specifications required for Ford F-250 and F-350 Super Duty models, ensuring proper fit and function.

Applications and Problem Solving

• Replacement for worn or warped rotors on Ford F-250 Super Duty and F-350 Super Duty
• Addresses brake noise and vibration issues caused by uneven rotor surfaces
• Improves heat dissipation to reduce brake fade during heavy towing or hauling
• Restores proper braking performance and pedal feel
• Prevents premature rotor wear due to high-stress driving conditions

Installation Notes and Tips

Ensure the rotor surface and hub are clean and free of rust before installation. Verify that the mounting bolt holes and center hole align precisely with the vehicle hub. Use a calibrated torque wrench to tighten mounting bolts to manufacturer specifications. It is recommended to replace brake pads simultaneously to maintain optimal braking performance. After installation, perform a brake bed-in procedure to ensure proper rotor and pad mating.

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet or exceed OEM standards for fit, form, and function. Each rotor undergoes strict quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details for part number 66798R should be confirmed with the supplier, Raybestos typically offers limited warranties covering defects in materials and workmanship.