Dynamite Friction 830-31027R Disc Brake Rotor - Front Right

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31027R) is engineered for BMW models including the 318i, 320i, 323i, 325i, 328i, Z3, and Z4. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Nominal thickness: 22 mm with a discard thickness of 20.4 mm
• Vented rotor design for improved cooling
• Directional slotted and drilled surface for debris removal and heat management
• Rust resistant coating for extended durability
• Geospec silver grey hat finish for corrosion resistance and aesthetics
• 5 bolt holes with 15 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 286 mm and height of 51.7 mm
• Center hole diameter of 79 mm for precise fitment

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 with a vented design. This combination improves brake pad bite, reduces brake fade by enhancing heat dissipation, and helps channel away water and debris. The directional surface pattern is optimized for specific rotational direction, ensuring consistent braking performance on compatible BMW models.

Detailed Product Description

This disc brake rotor is designed specifically for select BMW vehicles such as the 318i, 318is, 318ti, 320i, 323Ci, 323i, 323is, 325i, 325is, 328i, 328is, Z3, and Z4. The rotor’s vented construction allows air to flow between the rotor faces, reducing heat buildup during braking. The drilled and slotted surface improves pad cleaning and gas venting, which helps maintain consistent braking under demanding conditions. The rotor’s nominal thickness of 22 mm and discard thickness of 20.4 mm provide a balance between durability and performance. The rust resistant coating and Geospec silver grey hat finish protect against corrosion, extending the rotor’s service life. The 5-bolt pattern with 15 mm diameter holes and 120 mm bolt circle diameter ensures precise fitment for the specified BMW models.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors on BMW 3 Series and Z models
• Improves braking performance in wet or dusty conditions due to slotted and drilled design
• Reduces brake fade during aggressive driving or towing
• Prevents rust and corrosion on rotor surfaces
• Restores proper rotor thickness and braking efficiency

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (20.4 mm) before installation
• Verify bolt hole pattern and center hole diameter match vehicle specifications
• Follow manufacturer torque specifications for lug nuts and bolts
• Inspect brake pads for wear and replace if necessary when installing new rotors
• Perform a proper bed-in procedure after installation to optimize braking performance

Quality Assurance and Warranty

Dynamite Friction manufactures the 830-31027R rotor to meet OEM standards for fit, form, and function. The rust resistant coating and durable finishes contribute to long service life. Warranty details are provided by Dynamite Friction and should be confirmed at the time of purchase.