Dynamite Friction 900-31089 Disc Brake Rotor - Front

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

The Dynamite Friction DFC Hi-Carbon Alloy GEOMET Coated Rotor (part number 900-31089) 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 xDrive, and 430i Gran Coupe.

• Nominal thickness: 23.8 mm
• Discard thickness: 22.4 mm
• Outside diameter: 312 mm
• Inside diameter: 79 mm
• Bolt hole diameter: 14.5 mm
• Bolt hole quantity: 5
• Height: 73.6 mm
• Vented rotor design for improved cooling

Detailed Product Features and Specifications

This disc brake rotor is constructed with a high-carbon alloy and features a GEOMET coating, which enhances corrosion resistance and extends rotor life. The vented design improves heat dissipation during braking, reducing the risk of brake fade under demanding conditions. With a nominal thickness of 23.8 mm and a discard thickness of 22.4 mm, this rotor maintains structural integrity and performance throughout its service life. The rotor measures 312 mm in outside diameter and includes five bolt holes with a diameter of 14.5 mm, ensuring compatibility with specific BMW wheel hubs.

DFC Hi-Carbon Alloy GEOMET Coated Rotor Product Line

The DFC Hi-Carbon Alloy GEOMET Coated Rotor line by Dynamite Friction focuses on delivering rotors that combine high-carbon alloy metallurgy with advanced GEOMET coating technology. This combination provides enhanced durability and corrosion resistance, making it suitable for vehicles requiring reliable braking performance under varied driving conditions. The 900-31089 rotor is part of this line, designed specifically for BMW models requiring vented rotors with precise fitment specifications.

Compatible BMW Models and Applications

• BMW 220i, 228i, 230i (including xDrive variants)
• BMW 320i, 323i, 325i, 328d, 328i, 330i (including xDrive and GT variants)
• BMW 428i, 430i (including Gran Coupe and xDrive variants)
• BMW X1

This rotor is intended for use in disc brake systems on these models, providing consistent braking performance and fitment accuracy.

Common Issues Addressed by This Rotor

• Brake rotor warping due to heat buildup
• Corrosion and rust on rotor surfaces
• Reduced braking efficiency from worn or thin rotors
• Brake noise caused by uneven rotor wear
• Vibration or pulsation during braking

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 22.4 mm before installation. Clean the rotor surface to remove any protective coating residue. Verify bolt hole alignment and torque bolts to manufacturer specifications. It is recommended to replace brake pads simultaneously to maintain optimal braking performance. Proper bedding-in of the rotor and pads will help achieve consistent stopping power.

Quality Assurance and Warranty

Dynamite Friction rotors, including the 900-31089, are manufactured to meet or exceed OEM standards for fit, form, and function. The GEOMET coating provides additional corrosion resistance to extend rotor life. Warranty details should be confirmed with the point of purchase or manufacturer documentation.