Dynamite Friction 830-31109R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31109R) is engineered for BMW models including the 328i, 330i, 335i, 340i, 428i, 430i, 435i, 440i, and ActiveHybrid 3. Designed to enhance braking performance, this vented disc brake rotor features a directional, slotted and drilled surface for improved heat dissipation and consistent stopping power.

• Compatible with multiple BMW models such as 328i xDrive, 335i GT xDrive, 430i Gran Coupe, and 440i xDrive Gran Coupe
• Directional slotted and drilled surface for optimized brake pad contact and cooling
• Vented rotor design with 330 mm outside diameter and 66.4 mm overall height
• Rust resistant coating with Geospec silver grey hat finish for durability
• 5 bolt holes with 16.8 mm diameter and 120 mm bolt circle diameter
• Nominal thickness of 20 mm and discard thickness of 18.4 mm for safe service limits

Detailed Product Features and Specifications

This disc brake rotor is constructed with a vented design to allow air flow between the rotor surfaces, reducing heat buildup during braking. The directional surface features both drilled holes and slots, which help evacuate gases, dust, and water, maintaining consistent brake pad contact and reducing brake fade. The rotor's plain disc finish combined with a Geospec silver grey hat finish provides corrosion resistance, supported by an additional rust resistant coating. The rotor measures 330 mm in outside diameter and 66.4 mm in height, with a center hole diameter of 75 mm. It includes five bolt holes, each 16.8 mm in diameter, arranged on a 120 mm bolt circle diameter, ensuring precise fitment on compatible BMW models.

DFC Geoperformance Rotor - Drilled and Slotted Product Line

The DFC Geoperformance Rotor - Drilled and Slotted line by Dynamite Friction focuses on delivering rotors that balance performance and durability. This product line incorporates advanced surface treatments and vented rotor designs to improve heat dissipation and braking consistency. The drilled and slotted surface pattern is directional, designed to optimize braking efficiency and pad bite for vehicles requiring reliable stopping power under varied driving conditions.

Applications and Problem Solving

• Reduces brake fade during aggressive or repeated braking
• Improves heat dissipation to extend rotor and pad life
• Minimizes brake dust and gas buildup for consistent braking
• Prevents rust and corrosion on rotor surfaces
• Ensures proper fitment for BMW 3 Series, 4 Series, and ActiveHybrid 3 models

Installation Notes and Tips

Ensure the rotor is installed on compatible BMW models listed for part number 830-31109R. Verify bolt hole alignment with the 5-lug, 120 mm bolt circle diameter pattern. Clean the rotor surface before installation to remove any protective coatings or residues. Use proper torque specifications for lug nuts to avoid rotor warping. Directional rotors must be installed with the correct rotation direction as indicated by the surface pattern.

Quality Assurance and Warranty

Dynamite Friction rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The rust resistant coating and Geospec silver grey hat finish contribute to long-term durability. While specific warranty details are not provided, Dynamite Friction products typically undergo rigorous quality control to ensure reliable performance on BMW vehicles.