Raybestos 56128 Disc Brake Rotor and Hub Assembly - Front

Overview of Raybestos 56128 Disc Brake Rotor and Hub Assembly

The Raybestos Specialty - Street Performance disc brake rotor and hub assembly, part number 56128, is engineered for reliable braking performance on select GM vehicles. Designed to meet the demands of models like the Buick Roadmaster, Cadillac Fleetwood, and Chevrolet Caprice, this assembly ensures consistent stopping power and durability.

• Compatible with Buick, Cadillac, Chevrolet, and Oldsmobile models including 60 Special, Brougham, Caprice, Commercial Chassis, Custom Cruiser, Fleetwood, Impala, and Roadmaster
• Mounting bolt hole quantity: 5 with a 127.0 mm bolt circle diameter
• Stud/lug hole quantity: 5 for secure wheel attachment
• Nominal rotor thickness: 1.035 inches (26.300 mm) with discard thickness at 0.965 inches (24.500 mm)
• Mounting bolt hole diameter: 0.488 inches (12.400 mm) for precise fitment

Specialty - Street Performance Product Line Details

The Specialty - Street Performance line by Raybestos focuses on delivering components tailored for street-driven vehicles requiring dependable braking under varied conditions. This part line balances performance and durability, making it suitable for classic and full-size GM vehicles where maintaining original braking characteristics is important.

Technical Description and Specifications

Part number 56128 is a disc brake rotor and hub assembly designed with exacting specifications to match factory dimensions. The rotor features a nominal thickness of 1.035 inches (26.300 mm) and a discard thickness of 0.965 inches (24.500 mm), ensuring safe service limits are clearly defined. The assembly includes five mounting bolt holes arranged on a 127.0 mm bolt circle diameter, with each hole measuring 0.488 inches (12.400 mm) in diameter. This configuration supports secure installation on compatible Buick, Cadillac, Chevrolet, and Oldsmobile models, including the Chevrolet Impala and Cadillac Brougham.

Applications and Problem Solving

• Replacement for worn or warped rotors on Buick Roadmaster and Cadillac Fleetwood
• Restores proper rotor thickness to prevent brake fade on Chevrolet Caprice and Impala
• Addresses vibration and noise issues caused by damaged rotor surfaces
• Ensures correct fitment and alignment for safe braking on Oldsmobile 60 Special and Brougham
• Supports reliable braking performance on Commercial Chassis and Custom Cruiser models

Installation Notes and Tips

When installing the Raybestos 56128 rotor and hub assembly, verify the mounting bolt hole pattern and diameter match your vehicle’s specifications. Ensure the rotor thickness is within nominal limits before installation. Proper torque on the five mounting bolts is critical to avoid rotor warping. It is recommended to inspect wheel studs and lug nuts for wear during installation to maintain secure wheel attachment.

Quality Assurance and Warranty

Raybestos products undergo rigorous quality control to meet industry standards for durability and performance. The Specialty - Street Performance line is manufactured to provide consistent braking characteristics for street-driven vehicles. Warranty coverage details should be confirmed with the product documentation or manufacturer, as they may vary by application.