Dynamite Friction 604-31111 Disc Brake Rotor - Rear

Rear Vented Disc Brake Rotor for BMW

The Dynamite Friction DFC GEOSPEC Coated Rotor is a rear vented disc brake rotor built for BMW applications that use standard brakes and the listed fitments. Part number 604-31111 is sized with a 300 mm outside diameter, 20 mm nominal thickness, and 18.4 mm discard thickness for service replacement on covered vehicles.

The DFC GEOSPEC coated rotor line is made for drivers who want a direct-fit brake rotor with corrosion-resistant surface treatment on non-friction areas. For BMW 220i, 230i, 320i, 328i, 328d, 228i, 228i xDrive, 428i, 323i, and related rear brake applications, this rotor supports OE-style fitment and consistent brake service dimensions.

Key Features

• Brand: Dynamite Friction
• Brand line: DFC GEOSPEC Coated Rotor
• Part number: 604-31111
• Rear disc brake rotor for vented rear brake setups
• 300 mm outside diameter
• 20 mm nominal thickness
• 18.4 mm discard thickness
• 5-bolt hole design with 16.6 mm bolt hole diameter
• 66.4 mm overall height
• 75 mm inside diameter

Detailed Description

Part number 604-31111 is a rear vented brake rotor in the Dynamite Friction DFC GEOSPEC Coated Rotor line. The coated rotor design helps protect non-friction surfaces while maintaining the braking surface dimensions needed for the listed BMW rear brake applications. With a 300 mm outside diameter and 20 mm nominal thickness, it matches the service requirements for standard-brake rear rotor replacements across multiple BMW 2 Series and 3 Series models.

Compatible With BMW rear brake applications including 2021 BMW 220i, 2015-2018 BMW 220i, 2017-2021 BMW 230i, 2017-2021 BMW 230i xDrive, 2016-2018 BMW 120i, 2013-2018 BMW 320i, 2014-2018 BMW 328d, 2014-2016 BMW 228i, 2015-2016 BMW 228i xDrive, 2014-2016 BMW 428i, and additional listed 323i and 328i configurations. This part number 604-31111 is also listed for several BMW 328i rear brake setups with standard brakes and M Sport package notes.

What It Helps Address

• Rear brake rotor wear that has reached service limits
• Brake pulsation caused by rotor thickness variation or surface wear
• Corrosion on exposed rotor surfaces
• Noise or uneven braking from worn rear rotors
• Brake service needs on BMW rear vented disc applications

Installation Notes and Tips

Verify rotor dimensions, bolt pattern, and rear brake configuration before installation. This rotor is listed for rear position only and for standard-brake applications noted in the fitment data. Confirm the vehicle’s brake package, model year, and any package-specific notes such as M Sport or production-date requirements before ordering. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Dynamite Friction’s DFC GEOSPEC Coated Rotor line is built around application-specific brake rotor dimensions and coated surfaces for service replacement use. Part number 604-31111 is cataloged to match the listed BMW rear fitments and brake specifications.