Dynamite Friction 830-31097R Disc Brake Rotor - Front Right

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31097R) is engineered for BMW models including the 535d, 535d xDrive, 535i, 535i xDrive, 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, and ActiveHybrid 5. This vented disc brake rotor combines drilled and slotted surface features with a rust-resistant coating to enhance braking performance and durability.

• Disc type: Vented disc brake rotor with drilled and slotted surface
• Nominal thickness: 30 mm; discard thickness: 28.4 mm
• Outside diameter: 348 mm; overall height: 66.5 mm
• Bolt hole quantity: 5; bolt hole diameter: 16.6 mm; bolt circle diameter: 120 mm
• Hat finish: Geospec silver grey with rust-resistant coating
• Directional brake surface design for optimized heat dissipation
• Center hole diameter: 75 mm; stud/lug hole diameter: 16.6 mm

Detailed Product Description

The 830-31097R rotor from Dynamite Friction’s DFC Geoperformance Rotor - Drilled and Slotted line is designed to meet the braking demands of select BMW vehicles. Its vented construction improves heat dissipation during braking, reducing the risk of brake fade under heavy use. The drilled and slotted surface enhances water and gas evacuation, maintaining consistent pad contact and improving stopping power. The rotor’s directional design ensures optimal performance when installed correctly, while the Geospec silver grey hat finish provides corrosion resistance supported by an additional rust-resistant coating. With a nominal thickness of 30 mm and a discard thickness of 28.4 mm, this rotor maintains structural integrity and longevity for reliable braking performance.

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 braking efficiency and heat management. This product line is tailored for drivers seeking enhanced brake cooling and debris removal, which is particularly beneficial for performance-oriented BMW models such as the 535i and 640i series. The rotors in this line feature vented designs and corrosion-resistant finishes to extend service life and maintain consistent braking under demanding conditions.

Applications and Problem Solving

• Compatible with BMW 535d, 535d xDrive, 535i, 535i xDrive, 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe, and ActiveHybrid 5 models
• Addresses brake fade caused by excessive heat buildup during aggressive driving
• Improves braking performance in wet conditions by evacuating water from the rotor surface
• Reduces brake pad glazing and uneven wear through enhanced gas and dust removal
• Helps prevent rust and corrosion on the rotor surface for longer service intervals

Installation Notes and Tips

Ensure the rotor is installed with the directional surface facing the correct rotation direction as indicated by the manufacturer. Verify that the bolt hole pattern (5 holes, 16.6 mm diameter, 120 mm bolt circle) matches the vehicle hub. Measure rotor thickness before installation to confirm it meets or exceeds the discard thickness of 28.4 mm. Proper torque specifications should be followed when securing the rotor to avoid warping or uneven wear.

Quality Assurance and Warranty

Dynamite Friction manufactures the 830-31097R rotor to meet OEM standards for fitment and performance on specified BMW models. The rotor features a rust-resistant coating and a durable Geospec silver grey hat finish to enhance longevity. Warranty details are provided by Dynamite Friction and should be reviewed at the time of purchase for coverage specifics.