Girodisc 380mm Front 2-Piece Floating Rotors for BMW G8X M2, M3 & M4 (A1-282)

Girodisc Front 2-Piece Floating Brake Rotors – BMW G80 M3, G82/G83 M4 & G87 M2

Upgrade your BMW's braking performance with the Girodisc A1-282 380mm Front 2-Piece Floating Rotors, engineered as a direct replacement for factory iron brake systems on the latest G8X platform. Designed for enthusiasts who demand exceptional braking consistency, these lightweight rotors improve cooling efficiency, reduce unsprung weight and deliver fade-resistant performance for spirited road driving, track days and motorsport use.

Unlike oversized big brake kits, Girodisc's two-piece floating rotor system retains the factory brake calipers, ABS calibration and brake bias while providing the benefits of a motorsport-inspired braking upgrade. Installation is completely bolt-on with no modifications required.

Motorsport-Proven Lightweight Construction

Each Girodisc rotor combines a precision CNC-machined 6061-T6 aircraft-grade aluminium centre hat with a proprietary high-carbon cast iron friction ring. This advanced construction significantly reduces rotating and unsprung mass while maintaining exceptional strength and thermal stability under repeated heavy braking.

The friction ring features 72 curved directional cooling vanes, engineered to maximise airflow through the rotor. Acting as a centrifugal air pump, this design rapidly evacuates heat from the braking surfaces, reducing brake fade and maintaining consistent pedal feel during demanding driving conditions.

Fully Floating Rotor Technology

The Girodisc floating assembly allows the cast iron friction ring to expand independently from the aluminium hat during extreme temperature changes.

Key advantages include:

• Reduced thermal stress during repeated heavy braking
• Improved resistance to rotor distortion and cracking
• More consistent brake pedal feel
• Better rotor alignment within the caliper
• Increased durability during aggressive road and circuit driving

The floating hardware also incorporates anti-noise spring washers to minimise unwanted rotor rattle during normal road use while allowing unrestricted thermal expansion when the brakes are under heavy load.

Serviceable Two-Piece Design

One of the biggest advantages of the Girodisc system is its modular construction. Once the friction rings reach their wear limit, they can be replaced separately while reusing the original aluminium hats.

This serviceable design offers:

• Lower long-term maintenance costs
• Reduced waste
• Faster brake servicing
• Retained lightweight performance
• Consistent braking performance throughout the life of the system

Features

• Genuine Girodisc A1-282 front rotor kit
• 380mm x 36mm front rotor size
• Direct OEM replacement for factory iron brake systems
• Designed for vehicles without Carbon Ceramic Brakes (CCB)
• Lightweight 6061-T6 aircraft-grade aluminium hats
• Proprietary high-carbon cast iron friction rings
• 72 curved directional cooling vanes
• Fully floating two-piece rotor construction
• Improved heat dissipation and fade resistance
• Reduced unsprung and rotating mass
• Replaceable friction rings for reduced servicing costs
• Maintains factory brake bias and ABS operation
• Ideal for road, track day and motorsport applications
• Sold as a pair

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  Vehicle Fitment

  Compatible with BMW models equipped with factory iron front brakes (non-CCB):

  • BMW G80 M3
  • BMW G80 M3 Competition
  • BMW G80 M3 Competition xDrive
  • BMW G81 M3 Touring
  • BMW G82 M4
  • BMW G82 M4 Competition
  • BMW G82 M4 Competition xDrive
  • BMW G83 M4 Convertible
  • BMW G87 M2

  Important: These rotors are designed for vehicles fitted with factory iron brake systems only. They are not compatible with BMW Carbon Ceramic Brake (CCB) systems. Please verify your vehicle's brake specification before ordering.

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  Why Choose Girodisc?

  Girodisc has built a worldwide reputation for producing premium braking components trusted by enthusiasts, professional workshops and race teams. Their lightweight two-piece floating rotor systems deliver exceptional cooling performance, reduced rotational mass and long-term serviceability while maintaining OEM fitment and braking characteristics.

  Whether you're upgrading your daily-driven G8X or preparing it for regular circuit use, Girodisc front rotors provide the confidence and reliability needed for high-performance driving.

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  Package Contents

  • 2 × Girodisc 380mm Front 2-Piece Floating Rotors
  • CNC-machined aluminium centre hats (pre-assembled)
  • Floating mounting hardware
  • Ready for installation