Raybestos 8521 Disc Brake Rotor - Front or Rear

Raybestos Specialty - Truck Disc Brake Rotor Overview

The Raybestos Specialty - Truck Disc Brake Rotor part number 8521 is engineered for heavy-duty truck applications requiring reliable braking performance. This vented, conventional rotor is designed to meet the demands of trucks that need durable and consistent stopping power.

• Vented disc brake rotor for improved heat dissipation
• Overall diameter of 15.000 inches (381.000 mm)
• Nominal thickness of 1.440 inches (36.600 mm) with discard thickness at 1.320 inches (33.550 mm)
• Overall height measures 3.505 inches (89.050 mm)
• Five mounting bolt holes with a bolt circle diameter of 6.750 inches (171.450 mm)
• Center hole diameter of 5.400 inches (137.150 mm)
• Conventional rotor type suitable for drum-in-hat configurations

Detailed Specifications and Features

This Raybestos disc brake rotor is part of the Specialty - Truck product line, which focuses on components tailored for truck braking systems. The vented design enhances cooling efficiency, reducing the risk of brake fade during extended use. With a nominal thickness of 1.440 inches and a discard thickness of 1.320 inches, this rotor provides a clear service life indicator to maintain optimal braking performance. The 15-inch outside diameter and 3.505-inch overall height ensure compatibility with a range of truck brake assemblies requiring a conventional rotor setup. The five mounting bolt holes and stud/lug hole quantity of five allow for secure installation on compatible truck models.

Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Upgrading to vented rotors for improved heat management in heavy-duty trucks
• Addressing rotor thickness below discard limits to restore braking efficiency
• Resolving noise or vibration issues related to rotor surface irregularities
• Maintaining proper rotor dimensions for safe and reliable brake system operation

Installation Notes and Tips

Ensure the rotor surface is clean and free of rust or debris before installation. Verify that the mounting bolt holes and center hole diameter match the vehicle’s hub specifications. Use a calibrated micrometer to check rotor thickness during installation and service intervals. Proper torque specifications should be followed for mounting bolts to avoid rotor warping. This rotor is designed for conventional drum-in-hat brake systems commonly found on trucks.

Quality Assurance and Warranty

Raybestos Specialty - Truck rotors are manufactured to meet industry standards for durability and performance. The part number 8521 undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details are not provided, Raybestos products typically come with a limited warranty against defects in material and workmanship.