DuraGo BR55078 Disc Brake Rotor - Rear

Overview of DuraGo BR55078 Disc Brake Rotor

The DuraGo BR55078 is a solid disc brake rotor designed for reliable braking performance on select Buick, Oldsmobile, and Pontiac vehicles. Engineered with cast iron construction, this rotor provides consistent stopping power for models like the Buick Rendezvous, Pontiac Aztek, and Oldsmobile Silhouette.

• Material: Durable cast iron for strength and heat dissipation
• Rotor Type: Solid, non-directional brake surface
• Construction: Full cast design with drum-in-hat configuration
• Dimensions: 11.43 inch (290.3 mm) outside diameter, 1.83 inch (46.4 mm) overall height
• Mounting: 5 bolt holes with 4.53 inch (115 mm) bolt circle diameter
• Nominal Thickness: 0.43 inch (11 mm) with discard thickness at 0.35 inch (9 mm)
• Compatible with ABS systems: No ABS tone ring included

Detailed Product Description

The DuraGo BR55078 disc brake rotor is constructed from cast iron, a material known for its durability and effective heat management during braking. This rotor features a solid, non-directional braking surface, which means it can be installed in any orientation without affecting performance. The full cast construction includes a drum-in-hat design, integrating the rotor and drum components for vehicles equipped with rear drum parking brakes.

With an outside diameter of 11.43 inches and an overall height of 1.83 inches, this rotor fits specific Buick, Oldsmobile, and Pontiac models, including the Montana, Silhouette, and Rendezvous. The rotor’s mounting configuration includes five bolt holes spaced on a 4.53-inch bolt circle diameter, ensuring proper fitment and secure installation. The nominal thickness of 0.43 inches provides a solid braking surface, while the discard thickness of 0.35 inches indicates when replacement is necessary to maintain safe braking performance.

Compatible Vehicles and Applications

This DuraGo disc brake rotor is compatible with the following makes and models:

• Buick Rendezvous
• Oldsmobile Silhouette
• Pontiac Aztek
• Buick Montana

It is designed for vehicles requiring a drum-in-hat type rotor without an ABS tone ring, making it suitable for certain rear brake applications on these models.

Common Issues Addressed by BR55078 Rotor

• Uneven or reduced braking performance due to worn or warped rotors
• Brake noise caused by rotor surface irregularities
• Vibration or pulsation during braking from rotor thickness variation
• Brake fade from insufficient heat dissipation in older rotors
• Incompatibility with drum-in-hat parking brake systems

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.35 inch) before installation
• Clean mounting surface to prevent rotor runout and vibration
• Torque mounting bolts to manufacturer specifications for secure fitment
• Check compatibility with vehicle’s parking brake system due to drum-in-hat design
• Inspect brake pads and hardware during rotor replacement for optimal performance

Quality Assurance and Warranty

DuraGo manufactures the BR55078 rotor to meet or exceed OEM specifications for fit, form, and function. The cast iron material and full cast construction provide durability under normal operating conditions. While no rust-resistant coating is applied, proper maintenance can help extend rotor life. Warranty coverage details should be confirmed with the product documentation or supplier.