DuraGo BR5559 Disc Brake Rotor - Rear

DuraGo BR5559 Rear Disc Brake Rotor

The DuraGo BR5559 is a rear disc brake rotor built from cast iron with a full cast construction for consistent braking performance. It is a conventional, solid rotor with a non-directional brake surface, making it a straightforward replacement for select Cadillac, Buick, and Oldsmobile applications.

Fits 1987-1992 Cadillac Allante, rear; fits 1988-1991 Buick Reatta, rear; fits 1986-1991 Buick Riviera, rear; fits 1986-1991 Cadillac Eldorado, rear; fits 1986-1991 Cadillac Seville, rear; fits 1986-1991 Oldsmobile Toronado, rear.

Key Features

• Cast iron rotor construction for dependable braking performance
• Full cast design for a conventional rear brake rotor replacement
• Solid rotor style with non-directional brake surface
• Outside diameter: 10.02 in. / 254.5 mm
• Nominal thickness: 0.50 in. / 12.6 mm
• Discard thickness: 0.43 in. / 10.9 mm
• Overall height: 1.5 in. / 38 mm
• 5-bolt mounting pattern with 4.53 in. / 115 mm bolt circle
• Center hole diameter: 2.78 in. / 70.7 mm
• No ABS tone ring, no cross drilling, and no slots

Detailed Description

DuraGo BR5559 is engineered as a direct-fit rear brake rotor for select 1986-1992 Cadillac, Buick, and Oldsmobile vehicles, including the Cadillac Allante, Buick Reatta, Buick Riviera, Cadillac Eldorado, Cadillac Seville, and Oldsmobile Toronado. The rotor uses a cast iron, full cast construction and a solid, conventional profile to match the requirements of the listed rear brake applications. DuraGo manufactures its brake drum and rotor program in ISO-certified factories, with attention to fit, form, and function for aftermarket replacement needs. This part cross-references Monroe Shocks & Struts (e.g., 5559, 5870) for the same application.

What This Rotor Helps Address

• Rear brake pulsation caused by rotor wear or thickness variation
• Brake noise related to an uneven or worn rotor surface
• Reduced braking consistency from a rotor at or near discard thickness
• Corrosion-related service issues on an aging rear brake rotor
• Replacement needs for a worn rotor on Cadillac Eldorado, Cadillac Seville, or Buick Riviera rear brake systems

Installation Notes and Tips

Verify rotor dimensions, bolt pattern, center hole diameter, and rear position before installation. Inspect the hub and brake components for wear, clean all mating surfaces, and confirm the rotor is within service thickness limits after installation. Because this rotor is non-directional and solid, it installs as a conventional rear brake replacement on the listed vehicles. Part number BR5559 should be matched to the vehicle application before service.

Quality Assurance

DuraGo has over 45 years of aftermarket manufacturing experience and produces brake components in ISO-certified factories. The BR5559 is built to meet fit, form, and function requirements for the specified rear applications, including Cadillac Allante, Buick Reatta, and Oldsmobile Toronado fitments.