DuraGo BR55075 Disc Brake Rotor - Rear

Overview of DuraGo BR55075 Disc Brake Rotor

The DuraGo BR55075 is a cast iron vented disc brake rotor designed for heavy-duty applications. Engineered for Chevrolet and GMC 3500 series trucks, this rotor offers reliable braking performance and durability under demanding conditions.

• Material: Full cast iron construction for strength and heat dissipation
• Vented design to improve cooling and reduce brake fade
• Drum-in-hat type rotor with integrated parking brake drum
• Outside diameter of 12.8 inches (325 mm) and overall height of 5.21 inches (132.3 mm)
• Mounting bolt pattern: 8 holes with 6.5 inch (165 mm) bolt circle diameter
• Nominal thickness of 1.18 inches (30 mm) with discard thickness at 1.12 inches (28.5 mm)
• Non-directional brake surface for flexible installation

Detailed Product Description

The DuraGo BR55075 disc brake rotor is constructed from full cast iron, providing a robust and heat-resistant braking surface suitable for heavy-duty trucks. Its vented design enhances airflow between the rotor faces, helping to dissipate heat more effectively during braking. This reduces the risk of brake fade and extends rotor life. The drum-in-hat construction integrates a parking brake drum, making it compatible with vehicles that use this combined braking system.

With an outside diameter of 325 mm and an overall height of 132.3 mm, this rotor fits Chevrolet Express 3500, GMC Savana 3500, and various Sierra and Silverado 3500 models, including HD and Classic versions. The mounting bolt pattern includes 8 holes spaced on a 165 mm bolt circle, ensuring secure attachment. The rotor’s nominal thickness is 30 mm, with a discard thickness of 28.5 mm, indicating when replacement is necessary to maintain safe braking performance.

Compatible Vehicles and Applications

• Chevrolet Express 3500
• GMC Savana 3500
• Chevrolet Silverado 3500, 3500 Classic, and 3500 HD
• GMC Sierra 3500, 3500 Classic, and 3500 HD

This rotor is designed specifically for these heavy-duty truck models, ensuring proper fitment and reliable braking under load.

Common Issues Addressed by DuraGo BR55075

• Brake rotor warping due to heat buildup
• Reduced braking efficiency from worn or thin rotors
• Noise and vibration caused by uneven rotor surfaces
• Parking brake malfunctions related to drum-in-hat rotor wear
• Corrosion-related rotor degradation (note: this rotor does not have rust-resistant coating)

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (1.12 inches) before installation
• Clean mounting surfaces to prevent uneven rotor seating
• Torque mounting bolts to manufacturer specifications for secure fit
• Check compatibility with ABS sensors; this rotor does not include an ABS tone ring
• Inspect brake pads and hardware during rotor replacement for optimal performance

Quality Assurance and Warranty

DuraGo manufactures the BR55075 rotor to meet or exceed OEM specifications for fit and function. The full cast iron construction and vented design support consistent braking performance. While this rotor does not feature a rust-resistant coating, proper maintenance can help extend service life. Warranty coverage details should be confirmed with the product provider or manufacturer.