Raybestos 8549 Disc Brake Rotor - Front or Rear

Raybestos Specialty Truck Coated Rotor Overview

The Raybestos Specialty - Truck; Coated Rotor part number 8549 is engineered for heavy-duty truck applications requiring reliable braking performance. This vented disc brake rotor features a smooth surface and precise dimensions to ensure consistent stopping power and durability.

• Nominal thickness: 1.437 inches (36.500 mm)
• Discard thickness: 1.319 inches (33.500 mm)
• Outside diameter: 15.000 inches (381.000 mm)
• Inside diameter: 10.118 inches (257.000 mm)
• Overall height: 3.494 inches (88.750 mm)
• Mounting bolt hole quantity: 6 with 0.778 inch (19.750 mm) diameter
• Center hole diameter: 5.402 inches (137.200 mm)
• Mounting bolt hole circle diameter: 6.748 inches (171.400 mm)
• Surface type: Smooth
• Rotor type: Vented, conventional

Detailed Product Description

The Raybestos 8549 disc brake rotor is designed as a vented rotor to improve heat dissipation during braking, reducing the risk of brake fade in demanding truck applications. Its smooth surface ensures even pad contact and wear, while the conventional design fits standard drum-in-hat configurations. The rotor’s precise dimensions, including a nominal thickness of 1.437 inches and an outside diameter of 15 inches, make it suitable for specific heavy-duty truck models requiring robust braking components.

This rotor is part of the Specialty - Truck; Coated Rotor line, which focuses on providing coated rotors that resist corrosion and extend service life in harsh operating environments. The coating helps protect the rotor from rust and environmental damage, which is critical for trucks exposed to road salts and moisture.

Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Upgrading corroded rotors to coated versions for improved longevity
• Addressing brake fade due to overheating in heavy truck use
• Ensuring proper fitment with 6-bolt mounting patterns on compatible trucks
• Maintaining braking performance on trucks requiring vented, conventional rotors

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 1.319 inches before installation. Verify compatibility with your truck’s mounting bolt pattern (6 holes, 0.778 inch diameter) and center hole diameter (5.402 inches). Proper cleaning of the rotor surface before installation is recommended to remove any protective coatings or residues. Use appropriate torque specifications for mounting bolts to avoid rotor warping.

Quality Assurance

Raybestos rotors are manufactured to meet or exceed OEM specifications for durability and performance. The Specialty - Truck; Coated Rotor line includes corrosion-resistant coatings to extend rotor life in demanding environments. While no specific warranty information is provided, Raybestos products are known for consistent quality and reliability in commercial truck brake applications.