Raybestos 681778R Disc Brake Rotor - Front

Overview of Raybestos R-Line Disc Brake Rotor 681778R

The Raybestos R-Line Disc Brake Rotor 681778R 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 consistent heat dissipation 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 cooling
• Nominal thickness of 1.499 inches (38.050 mm) with discard thickness at 1.433 inches (36.400 mm)
• Overall height of 4.556 inches (115.750 mm)
• Outside diameter measuring 14.291 inches (363.000 mm)
• Eight mounting bolt holes with a 6.698 inch (170.150 mm) bolt circle diameter
• Smooth surface type for consistent pad contact

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 manufacturing standards and material quality to meet the demands of trucks like the Ford F-250 Super Duty and F-350 Super Duty. The 681778R rotor exemplifies the R-Line’s commitment to durability and performance under rigorous conditions.

Technical Specifications and Features

This disc brake rotor features a vented design that enhances heat dissipation during braking, reducing the risk of brake fade. The nominal thickness of 1.499 inches (38.050 mm) ensures a robust braking surface, while the discard thickness of 1.433 inches (36.400 mm) indicates the minimum safe thickness before replacement is necessary. The rotor’s outside diameter of 14.291 inches (363.000 mm) and overall height of 4.556 inches (115.750 mm) are engineered to fit precisely on the specified Ford Super Duty models. With eight mounting bolt holes arranged on a 6.698 inch (170.150 mm) bolt circle diameter, installation aligns with factory specifications. The smooth surface type promotes even pad wear and consistent braking response.

Applications and Problem Solving

• Replacement for worn or warped rotors on Ford F-250 Super Duty and F-350 Super Duty
• Addresses brake fade caused by overheating during heavy towing or hauling
• Resolves vibration or pulsation issues due to uneven rotor surfaces
• Improves braking consistency and pedal feel in demanding driving conditions
• Restores proper rotor thickness to maintain safe braking performance

Installation Notes and Tips

Ensure the rotor surface is clean and free of rust or debris before installation. Verify that the mounting bolt holes align correctly with the vehicle’s hub assembly. It is recommended to replace brake pads simultaneously to optimize braking efficiency. Measure rotor thickness before installation to confirm it meets or exceeds the discard thickness specification of 1.433 inches (36.400 mm). Proper torque specifications should be followed when securing the rotor to avoid warping.

Quality Assurance and Warranty

Raybestos R-Line rotors are manufactured to meet or exceed OEM standards for fit, form, and function. Each rotor undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details for part number 681778R should be confirmed with the supplier, Raybestos typically offers limited warranties covering defects in materials and workmanship.