Dynamite Friction 830-31070R Disc Brake Rotor - Rear Right

Overview of Dynamite Friction DFC Geoperformance Rotor

The Dynamite Friction DFC Geoperformance Rotor - Drilled and Slotted (part number 830-31070R) is engineered for BMW models including the 330i, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi, and X1. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 330i, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi, and X1
• Part number: 830-31070R
• Vented disc brake rotor with directional drilled and slotted surface
• Nominal thickness: 22 mm; discard thickness: 20.4 mm
• Overall diameter: 336 mm; height: 67.2 mm
• Rust resistant coating with Geospec silver grey hat finish
• 5 bolt holes with 14.8 mm diameter and 120 mm bolt circle diameter

Detailed Product Description

The DFC Geoperformance Rotor - Drilled and Slotted from Dynamite Friction is designed to meet the braking demands of select BMW vehicles. This rotor features a vented design that improves heat dissipation during braking, reducing the risk of brake fade under heavy use. The directional surface is both drilled and slotted, which helps to evacuate gases, dust, and water from the braking surface, maintaining consistent pad contact and improving overall braking response.

Constructed with a plain disc finish and a Geospec silver grey hat finish, this rotor also includes a rust resistant coating to extend its service life. The rotor measures 336 mm in outside diameter with a height of 67.2 mm, and it maintains a nominal thickness of 22 mm, with a discard thickness of 20.4 mm to ensure safe replacement intervals. The 5-bolt hole pattern with 14.8 mm diameter holes and a 120 mm bolt circle diameter matches the specified BMW fitments precisely.

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 to optimize braking performance and thermal management. This product line is engineered to provide enhanced stopping power and improved pad bite for vehicles requiring reliable and consistent braking under various driving conditions. The directional surface pattern is designed to maximize the efficiency of gas and debris evacuation, which is critical for maintaining brake performance in BMW models such as the 330i and 335i series.

Applications and Problem Solving

• Reduces brake fade during aggressive or repeated braking
• Improves heat dissipation to protect brake components
• Enhances wet weather braking by channeling water away
• Minimizes brake dust buildup for cleaner rotor surface
• Maintains consistent brake pad contact for smoother stops

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (20.4 mm) before installation
• Clean rotor surface before mounting to remove any protective coatings
• Verify bolt hole alignment with vehicle hub (5 holes, 14.8 mm diameter, 120 mm bolt circle)
• Use proper torque specifications for lug nuts to avoid rotor warping
• Inspect brake pads for wear and replace if necessary to ensure optimal performance

Quality Assurance

Dynamite Friction manufactures the 830-31070R rotor to meet strict quality standards for fitment and performance on BMW vehicles. The rust resistant coating and durable construction contribute to long service life. Please consult Dynamite Friction or authorized distributors for warranty details specific to this rotor.