DuraGo BD8850 Brake Drum - Rear

Durable Cast Iron Brake Drum for Chevrolet and GMC Trucks

The DuraGo BD8850 brake drum is engineered to provide reliable braking performance for heavy-duty Chevrolet and GMC trucks. Designed with full cast construction and outer cooling fins, this brake drum supports effective heat dissipation and long-lasting durability.

• Material: Full cast iron construction for strength and durability
• Outside Diameter: 15.31 inches (389 mm) for precise fitment
• Nominal Drum Diameter: 13 inches (330.2 mm)
• Brake Surface Width: 4.02 inches (102.1 mm) for consistent braking contact
• Bolt Hole Quantity: 8 with 0.61 inch (15.5 mm) diameter holes
• Bolt Circle Diameter: 6.5 inches (165.1 mm)
• Center Hole Diameter: 4.6 inches (116.9 mm)
• Includes outer cooling fins to help reduce brake fade
• ABS Tone Ring: Not included
• Rust Resistant Coating: Not applied

Technical Details and Construction

The DuraGo BD8850 brake drum is constructed from cast iron, a material known for its excellent wear resistance and heat dissipation properties. The full cast design ensures structural integrity under heavy braking conditions. With an outside diameter of 15.31 inches and a nominal drum diameter of 13 inches, this brake drum is designed to meet the specifications required for select Chevrolet and GMC heavy-duty truck models. The inclusion of outer cooling fins enhances heat dissipation, helping to maintain braking efficiency during extended use.

Compatible Chevrolet and GMC Truck Models

This brake drum is compatible with a range of Chevrolet and GMC heavy-duty trucks, including C30, C3500, G30, K30, K3500, P30, P3500, R30, R3500, V30, and V3500 models. The DuraGo BD8850 is designed to match the bolt pattern and dimensions required for these vehicles, ensuring proper fit and function.

Common Applications and Problem Solving

• Replacement for worn or scored brake drums causing uneven braking
• Addressing brake fade due to overheating with improved cooling fins
• Resolving vibration or noise issues related to damaged drums
• Restoring braking surface width for consistent brake shoe contact
• Ensuring proper bolt hole alignment for secure installation

Installation Notes and Tips

When installing the DuraGo BD8850 brake drum, ensure the mating surfaces are clean and free of debris. Verify the bolt hole alignment matches the vehicle’s hub assembly. Since this brake drum does not include an ABS tone ring, confirm compatibility with your vehicle’s ABS system if applicable. It is recommended to inspect brake shoes and hardware during installation and replace as necessary to maintain optimal braking performance.

Quality Assurance and Warranty

DuraGo brake drums are manufactured to meet or exceed OEM specifications for fit, form, and function. The BD8850 part number undergoes rigorous quality control to ensure durability and consistent performance. While no rust-resistant coating is applied, the cast iron construction provides reliable wear resistance. Warranty coverage details should be confirmed through the product documentation or manufacturer.