Dynamite Friction 900-31111 Disc Brake Rotor - Rear

Overview of Dynamite Friction DFC Hi-Carbon Alloy GEOMET Coated Rotor

The Dynamite Friction DFC Hi-Carbon Alloy GEOMET Coated Rotor (part number 900-31111) 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 120i, 220i, 228i, 230i, 320i, 323i, 325i, 328d, 328i, and 428i.

• Vented rotor design for improved heat management
• Nominal thickness of 20 mm with a discard thickness of 18.4 mm
• Outside diameter of 300 mm and inside diameter of 75 mm
• Five bolt holes with a diameter of 16.6 mm for secure fitment
• Height of 66.4 mm ensuring proper alignment and clearance

Product Line Details: DFC Hi-Carbon Alloy GEOMET Coated Rotor

This rotor is part of the DFC Hi-Carbon Alloy GEOMET Coated Rotor line by Dynamite Friction, which features high-carbon alloy construction combined with a GEOMET coating. The high-carbon alloy enhances rotor durability and reduces the risk of cracking under stress, while the GEOMET coating provides corrosion resistance to extend rotor life. This combination is designed to maintain braking efficiency and rotor integrity over time.

Technical Specifications and Compatibility

The rotor measures 300 mm in outside diameter and 75 mm inside diameter, with a nominal thickness of 20 mm and a discard thickness of 18.4 mm, ensuring it meets OEM standards for the specified BMW models. The vented design improves airflow to reduce heat buildup during braking, which helps maintain consistent performance and reduces brake fade. The rotor features five bolt holes with a diameter of 16.6 mm, matching the bolt pattern of compatible BMW vehicles including the 120i, 220i, 228i, 228i xDrive, 230i, 230i xDrive, 320i, 323i, 325i, 328d, 328i, and 428i.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing rotor corrosion and surface degradation
• Improving heat dissipation to reduce brake fade during extended use
• Restoring proper rotor thickness for safe braking performance
• Ensuring compatibility with specific BMW 3 and 4 Series models for reliable fitment

Installation Notes and Tips

When installing the Dynamite Friction 900-31111 rotor, ensure the rotor surface is clean and free of any contaminants before mounting. Verify the bolt hole alignment with the vehicle hub and torque bolts to manufacturer specifications. It is recommended to inspect brake pads and replace them if worn to maintain optimal braking performance. Proper bedding-in of the new rotor and pads will help achieve consistent braking results.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet or exceed OEM specifications for fit, form, and function. The high-carbon alloy construction combined with the GEOMET coating provides enhanced durability and corrosion resistance. While specific warranty details are not provided, Dynamite Friction products typically adhere to industry standards for quality and reliability.