Dynamite Friction 604-31111 Disc Brake Rotor - Rear

Overview of Dynamite Friction DFC GEOSPEC Coated Rotor 604-31111

The Dynamite Friction DFC GEOSPEC Coated Rotor 604-31111 is engineered for precision braking performance on select BMW models. Designed as a vented disc brake rotor, it offers reliable heat dissipation and consistent stopping power for vehicles such as the BMW 320i, 328i, and 230i xDrive.

• Nominal thickness: 20 mm
• Discard thickness: 18.4 mm
• Outside diameter: 300 mm
• Inside diameter: 75 mm
• Bolt hole diameter: 16.6 mm
• Bolt hole quantity: 5
• Height: 66.4 mm
• Vented rotor design for improved cooling

Detailed Product Description and Specifications

This disc brake rotor, part number 604-31111, is specifically designed for BMW vehicles including the 120i, 220i, 228i, 228i xDrive, 230i, 230i xDrive, 320i, 323i, 325i, 328d, 328i, and 428i models. The rotor features a vented design that enhances heat dissipation during braking, reducing the risk of brake fade under demanding conditions. With a nominal thickness of 20 mm and a discard thickness of 18.4 mm, this rotor maintains structural integrity and performance throughout its service life. The 300 mm outside diameter and 75 mm inside diameter ensure proper fitment and compatibility with the specified BMW models. The rotor includes five bolt holes with a diameter of 16.6 mm, matching the factory specifications for secure installation.

About the DFC GEOSPEC Coated Rotor Product Line

The DFC GEOSPEC Coated Rotor line by Dynamite Friction focuses on rotors with specialized coatings that provide corrosion resistance and extended durability. This coating helps protect the rotor surface from rust and environmental wear, which is particularly beneficial for vehicles exposed to varying weather conditions. The 604-31111 rotor benefits from this coating, contributing to longer service intervals and consistent braking performance on BMW 3 Series and 4 Series models.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 320i and 328i
• Improves braking consistency on BMW 230i xDrive and 228i xDrive
• Addresses brake noise and vibration issues caused by uneven rotor surfaces
• Helps reduce brake fade during extended driving or heavy braking
• Prevents corrosion-related rotor damage in humid or salty environments

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (18.4 mm) before installation
• Clean mounting surface and hub to prevent runout and vibration
• Torque bolts to manufacturer specifications for BMW 120i through 428i models
• Inspect brake pads for wear and replace if necessary during rotor installation
• Perform a bed-in procedure after installation to optimize braking performance

Quality Assurance and Warranty

Dynamite Friction manufactures the 604-31111 rotor to meet or exceed OEM standards for fit, form, and function. The DFC GEOSPEC Coated Rotor line undergoes rigorous quality control to ensure durability and consistent braking performance. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.