Girodisc 2-Piece Rotors for BMW F8X M2/M3/M4
Girodisc 2-piece iron rotors for the BMW F80 M3, F82/F83 M4 and F87 M2 models. These iron rotors are available as a direct replacement for your factory iron rotors or to replace the costly carbon ceramics with a more affordable iron option.
If you are replacing your factory carbon ceramic rotors with new iron rotors, you'll need to choose new brake pads designed for iron rotors.
When you need to replace the rotor rings, they are available separately with new hardware and you can simply reuse the Girodisc hats you have.
186 Fits:
• M2, M3 & M4 with blue calipers and iron rotors
220 Fits:
• M3, M4 including CS with optional carbon ceramic brake package and gold calipers
• M2, M2 Competition & M2 CS with red or silver calipers
• M2 CS with optional carbon ceramic brake package and gold calipers
Caliper Notes:
The blue calipers are the standard 4 piston front and 2 piston rear. Gold, red and silver calipers are 6 piston front and 4 rear.
BMW Model Years:
• 2015-2018 BMW M3 (F80)
• 2015-2020 BMW M4 (F82)
• 2015-2020 BMW M4 Convertible (F83)
• 2016-2020 BMW M2 (F87)
Purchase Includes:
(2) Rotors
Sold in pairs, front or rear
Weights:
• TBA
Shipping Times:
Girodisc rotors typically ship in 1-2 weeks.
More from Girodisc:
The Girodisc system is a direct replacement for the OE disc. No modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. This reduction in rotational and unsprung weight allows for quicker acceleration and suspension response.
The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.
The rotor and hat have a floating mount system, which utilizes high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.
Once the Girodisc system is in place, simply replace the cast iron rotor when needed.
When used with performance pads and hi-temp fluid, you have what amounts to a truly amazing solution to overheating or warping rotors.
If you are replacing your factory carbon ceramic rotors with new iron rotors, you'll need to choose new brake pads designed for iron rotors.
When you need to replace the rotor rings, they are available separately with new hardware and you can simply reuse the Girodisc hats you have.
| Rotors: | Fitment: | Part Number: |
| Front Pair | For Blue Calipers | A1-186 |
| Rear Pair | For Blue Calipers | A2-186 |
| Front Pair | For Red, Silver or Gold Calipers | A1-220 |
| Rear Pair | For Red, Silver or Gold Calipers | A2-220 |
• M2, M3 & M4 with blue calipers and iron rotors
220 Fits:
• M3, M4 including CS with optional carbon ceramic brake package and gold calipers
• M2, M2 Competition & M2 CS with red or silver calipers
• M2 CS with optional carbon ceramic brake package and gold calipers
Caliper Notes:
The blue calipers are the standard 4 piston front and 2 piston rear. Gold, red and silver calipers are 6 piston front and 4 rear.
BMW Model Years:
• 2015-2018 BMW M3 (F80)
• 2015-2020 BMW M4 (F82)
• 2015-2020 BMW M4 Convertible (F83)
• 2016-2020 BMW M2 (F87)
Purchase Includes:
(2) Rotors
Sold in pairs, front or rear
Weights:
• TBA
Shipping Times:
Girodisc rotors typically ship in 1-2 weeks.
More from Girodisc:
The Girodisc system is a direct replacement for the OE disc. No modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. This reduction in rotational and unsprung weight allows for quicker acceleration and suspension response.
The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.
The rotor and hat have a floating mount system, which utilizes high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.
Once the Girodisc system is in place, simply replace the cast iron rotor when needed.
When used with performance pads and hi-temp fluid, you have what amounts to a truly amazing solution to overheating or warping rotors.
See more GiroDisc Products
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