Girodisc Rear 380mm Floating Brake Rotors – BMW F80 M3, F82/F83 M4 & F87 M2

Upgrade your BMW's braking performance with the Girodisc 380mm Rear 2-Piece Floating Brake Rotors. Engineered for enthusiasts who demand exceptional stopping power and reliability, these premium rear rotors deliver improved cooling, reduced unsprung weight, and consistent braking performance on both the road and the track.

Designed as a direct replacement for the factory rear brake discs, the Girodisc system bolts straight onto the vehicle with no modifications required. By retaining the original calipers and brake balance, these rotors preserve OEM brake bias and ABS functionality while providing the benefits of a lightweight motorsport-inspired braking solution.

Engineered for Maximum Performance

Each Girodisc rotor combines a precision CNC-machined 6061-T6 aircraft-grade aluminium hat with a proprietary high-carbon cast iron friction ring. This lightweight construction reduces rotational mass while offering exceptional thermal stability during repeated heavy braking.

The rotor features a motorsport-developed curved directional vane design, which acts as a centrifugal pump to draw cool air through the disc. This significantly improves heat dissipation, helping to minimise brake fade and maintain consistent pedal feel under demanding conditions.

Advanced Floating Rotor Technology

The Girodisc floating assembly utilises 12 high-strength alloy steel drive pins with corrosion-resistant cadmium plating to connect the rotor ring to the aluminium hat.

This floating design provides several key advantages:

• Allows the rotor ring to expand freely under extreme temperatures
• Reduces thermal stress and the likelihood of rotor distortion
• Improves brake pedal consistency
• Helps the rotor self-centre within the caliper
• Delivers smoother braking during repeated high-load applications

Anti-noise spring washers are incorporated into the mounting system to eliminate the rattling commonly associated with floating rotors, ensuring quiet operation during everyday driving without compromising performance.

Ideal for Carbon Ceramic Conversions

These Girodisc iron rotors are an excellent solution for vehicles originally equipped with BMW Carbon Ceramic Brakes (CCB). They install without modification, allowing owners to convert to a high-performance iron rotor setup while retaining factory calipers.

For optimum performance, Girodisc recommends fitting brake pads specifically designed for use with iron brake discs when converting from carbon ceramic rotors.

Features

• Genuine Girodisc rear 2-piece floating rotor kit
• 380mm rear rotor diameter
• Direct bolt-on replacement for compatible BMW models
• Lightweight 6061-T6 aircraft-grade aluminium hats
• Proprietary high-carbon cast iron rotor rings
• Curved directional cooling vanes for superior heat dissipation
• Fully floating rotor design with 12 alloy steel drive pins
• Anti-noise spring hardware for quiet street operation
• Maintains factory brake bias and ABS performance
• Reduced unsprung and rotating mass
• Replaceable rotor rings for lower long-term maintenance costs
• Ideal for fast road, track day and motorsport use
• Sold as a pair

Vehicle Fitment

Compatible with:

• BMW F80 M3
• BMW F80 M3 CS (Carbon Ceramic Brake models with gold calipers)
• BMW F82 M4
• BMW F82 M4 CS
• BMW F83 M4 Convertible
• BMW F87 M2 Competition (Red or Silver calipers)
• BMW F87 M2 CS
• BMW F87 M2 CS with Carbon Ceramic Brakes (Gold calipers)

Important: Vehicles fitted with blue brake calipers require a different rear rotor size. Please verify your braking system before ordering.

Serviceable Two-Piece Design

Unlike conventional one-piece brake discs, Girodisc's modular rotor design allows the cast iron friction rings to be replaced independently once worn. The original aluminium hats can be reused, reducing long-term servicing costs while maintaining the performance benefits of the complete Girodisc system.

Whether your BMW is driven daily, enjoys regular track days or competes in motorsport, Girodisc rear rotors deliver reliable, fade-resistant braking lap after lap.

Package Contents

• 2 × Girodisc 380mm Rear Floating Rotors
• Aluminium centre hats pre-assembled
• Floating mounting hardware
• Ready for installation