Dynamite Friction 830-31117R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31117R) is engineered for precision braking performance on select BMW models. Designed with a vented, directional surface, this rotor enhances heat dissipation and braking consistency for vehicles such as the BMW 320i xDrive and 330i GT xDrive.

• Disc type: Vented disc brake rotor with drilled and slotted surface
• Nominal thickness: 20 mm with discard thickness at 18.4 mm
• Outside diameter: 300 mm for optimal braking surface
• Directional surface finish with plain disc and Geospec silver grey hat finish
• Rust resistant coating to extend rotor life
• 5 bolt holes with 16.8 mm diameter and 120 mm bolt circle diameter
• Center hole diameter: 75.05 mm
• Compatible with multiple BMW models including 328i xDrive, 428i Gran Coupe, and X1

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and heat dissipation. This design reduces brake fade under demanding conditions and helps maintain consistent braking performance. The directional surface pattern is optimized for specific rotational direction, ensuring efficient water and debris evacuation on BMW vehicles.

Detailed Product Description

This disc brake rotor features a vented design with a 300 mm outside diameter and a nominal thickness of 20 mm, providing a robust braking surface for enhanced heat management. The drilled and slotted surface type improves pad cleaning and gas release during braking, which is critical for maintaining consistent stopping power. The rotor’s hat is finished in Geospec silver grey, offering corrosion resistance and a clean appearance. Additionally, the rotor includes a rust resistant coating to protect against environmental wear, extending the rotor’s service life. The 5-bolt hole configuration with a 120 mm bolt circle diameter ensures compatibility with a range of BMW models including the 320i xDrive, 330i, and 428i xDrive Gran Coupe.

Applications and Problem Solving

• Improves braking performance on BMW 328i xDrive and 330i GT xDrive models
• Reduces brake fade during extended or aggressive driving
• Enhances heat dissipation to prevent rotor warping
• Helps maintain consistent brake pad contact and bite
• Protects against rust and corrosion for longer rotor life

Installation Notes and Tips

Ensure the rotor is installed with the directional surface facing the correct rotation direction as indicated by the vehicle’s wheel rotation. Verify bolt hole alignment with the 5-lug pattern and 120 mm bolt circle diameter. Check rotor thickness before installation; replace if below the discard thickness of 18.4 mm. Proper torque specifications should be followed to avoid rotor damage or uneven wear.

Quality Assurance

Dynamite Friction manufactures the DFC Geoperformance Rotor - Drilled and Slotted to meet OEM standards for fit and function. The rust resistant coating and precision machining contribute to durability and reliable braking performance. Warranty information is available through the manufacturer or authorized distributors.