# Girodisc Front Brake Discs 394x36 for McLaren 570S & GT (2015–2021) – 650S (2014–2017) – 675LT (2015–2017) – MP4-12C (2011–2

> Pair of Girodisc front disks, 394 × 36 mm, part no.: A1-159. High-performance floating brake discs on aluminum hubs for McLaren 570S & GT with CCB (2015–2021); McLaren 650S (2014–2017); McLaren 675LT (2015–2017); McLaren MP4-12C with CCB (2011–2014).

- URL: https://www.gt2i.ch/en/brake-disk-for-bell/224566-girodisc-front-brake-discs-394x36-for-mclaren-570s-amp-gt-20152021-650s-20142017-675lt-20152017-mp4-12c-20112-3666618858913.html
- Reference: GIRO-A1-159
- Price: CHF 2,418.95
- Brand: GIRODISC
- Availability: out of stock

## Description

Girodisc A1-159 front brake discs, measuring 394 × 36 mm, enhance braking endurance during sustained use on the McLaren 570S & GT with carbon-ceramic rotors (2015–2021), McLaren 650S (2014–2017), McLaren 675LT (2015–2017), and McLaren MP4-12C with carbon-ceramic rotors (2011–2014). Their cast-iron pads and aluminum hubs form a floating assembly designed to manage thermal stresses and facilitate pad replacement during wear. Sold as a pair, including one left and one right rotor.
These rotors are intended for the front axle of your McLaren 570S & GT in the configuration shown below. They are compatible with the existing calipers; any required spacers and brake pad specifications must be observed.
The curved internal cooling fins channel air through the rotor to dissipate heat during repeated braking. The floating mounting reduces stress caused by thermal expansion differences between the brake pad and the rotor and helps the pad center itself between the brake pads, maintaining consistent contact when hot.
The hub is made of 6061-T6 aluminum. The high-strength steel drive pins are cadmium-trimmed to resist corrosion. They are secured by Class 12.9 bolts and hardened washers. Spring washers minimize cold-mounting noise while allowing the necessary compression for the floating mount.
New pads must be installed with new rotors or brake tracks. Their shape and compound must match the mounting, cast iron, and intended use; adhere to the specific requirements of this part number and perform the prescribed break-in procedure.
On compatible vehicles originally equipped with carbon-ceramic rotors, this pair provides a conversion solution to high-quality cast-iron rotors. It allows you to remove and store the expensive original carbon-ceramic rotors to preserve them during heavy-duty use, while reusing compatible calipers. Use new brake pads suitable for cast iron and adhere to the pad shapes and any spacers specified by the part number. Replaceable brake pads reduce the cost of replacing braking surfaces under heavy use and offer a choice of linings to tailor bite and pedal reaction to the intended use.
Specifications for Girodisc A1-159 Brake Rotors for McLaren 570S & GT
Brand: Girodisc
PartNumber: A1-159
Position: front
Sizes (diameter × thickness): 394 × 36 mm
Vehicles and models: McLaren 570S & GT with carbon-ceramic rotors (2015–2021); McLaren 650S (2014–2017); McLaren 675LT (2015–2017); McLaren MP4-12C with carbon-ceramic rotors (2011–2014)
Braking surface: high-resistance cast steel
Packaging: Pair of complete rotors, one left and one right, with disc bells.
Hub: 6061-T6 aluminum
Construction: two-piece floating mounting design
Catalog part number: D1-159. Verify compatibility with the caliper generation before replacement.
Internal ventilation: directional curved fins
Minimum thickness: 34 mm
Original rotor diameter: 394 mm
Manufacturing of main components: United States
Vehicles compatible with Girodisc part number A1-159
McLaren 570S & GT with carbon-ceramic rotors (2015–2021)
McLaren 650S (2014–2017)
McLaren 675LT (2015–2017)
McLaren MP4-12C with carbon-ceramic rotors (2011–2014)
McLaren 570S & GT with carbon-ceramic rotors (2015–2021): For vehicles with factory-installed carbon-ceramic brakes.
McLaren 570S & GT with carbon-ceramic rotors (2015–2021): Brake pads with a maximum radial sweep height of 66 mm are required for this track.
McLaren 650S (2014–2017): Brake pads with a maximum radial sweep height of 66 mm are required for this track.
McLaren 675LT (2015–2017): Brake pads with a maximum radial sweep height of 66 mm are required for this track.
McLaren MP4-12C with carbon-ceramic rotors (2011–2014): For vehicles with factory-installed carbon-ceramic brakes.
McLaren MP4-12C with carbon-ceramic brake disks (2011–2014): Brake pads with a maximum radial height of 66 mm are required for this track.
Each application is subject to its specific brake system configuration, calipers, and any requirements for brake pads or spacers. Please verify these requirements before ordering.
Girodisc A1-159 Mounting Requirements
McLaren 570S & GT with carbon-ceramic rotors (2015–2021): For vehicles with factory-installed carbon-ceramic brakes.
McLaren 570S & GT with carbon-ceramic rotors (2015–2021): Brake pads with a maximum radial sweep height of 66 mm are required for this track.
McLaren 650S (2014–2017): Brake pads with a maximum radial sweep height of 66 mm are required for this track.
McLaren 675LT (2015–2017): Brake pads with a maximum radial sweep height of 66 mm are required for this track.
McLaren MP4-12C with carbon-ceramic rotors (2011–2014): For vehicles with factory-installed carbon-ceramic brakes.
McLaren MP4-12C with carbon-ceramic brake disks (2011–2014): Brake pads with a maximum radial height of 66 mm are required for this track.
Brake Pads and Brake System for Your McLaren 570S & GT
Choose brake pads whose shape is compatible with the calipers, the track, and/or the A1-159 rotor, and whose compound is suitable for sport driving or track use. The Endless, pagid Racing, or Ferodo Racing ranges may be considered after verifying the appropriate part number.
For intensive use, we recommend compatible aviation-grade flexible hoses and high-performance brake fluid that meets the vehicle’s specifications, along with proper bleeding and fluid replacement. This recommendation complements the mounting, which is compatible with the original hydraulic system.
Maintenance of the Girodisc Mounting on Your McLaren 570S & GT
Replacing the pads alone allows you to keep the controlled rotors in good condition. Reusing a rotor for up to three pad replacements is subject to inspection of its condition, its mounting components, and the mounting instructions; this number does not constitute a guaranteed service life. Use a new mounting component with each pad replacement.
FAQ — Girodisc A1-159 for McLaren 570S & GT
What are the sizes of the A1-159 discs for my McLaren 570S & GT? The part number listed measures 394 × 36 mm and is installed on the front axle. The diameter alone is not sufficient: also verify the brake system version and mounting requirements.
Is the product sold in pairs? Yes. It includes a left and a right disc for the same axle. Both discs come with their hubs.
Do I need to replace the brake pads on my McLaren 570S & GT?Yes. Always install new brake pads with new rotors or new braking surfaces. Use a compound suitable for cast iron and your specific use. Brake pads with a maximum radial height of 66 mm are required for this track.
How do I identify the left and right sides? Girodisc rotors come with a label attached to each rotor: LEFT for the left side and RIGHT for the right side, as viewed from the direction of travel. On a left-hand-drive vehicle, “LEFT” corresponds to the driver’s side and “RIGHT” to the passenger side. Follow these labels and the instructions. On models with curved internal fins, the rolling direction depends on this internal ventilation; the surface grooves alone are not sufficient to determine the side.
How do I break in this mounting on my McLaren 570S & GT? Follow the Girodisc procedure and the brake pad manufacturer’s instructions to build an even transfer ply. The PDF documents below detail installation and break-in.
PDF Documents for Mounting and Break-in
We have included two PDF documents below: one manual for installing and breaking in the discs, and one manual for installing new tracks on existing rotors. Consult the document that applies to your specific task before you begin.
Girodisc A1-159 Highlights
394 × 36 mm size for the front brakes of your McLaren 570S & GT.
6061-T6 aluminum rotor and floating mount to manage thermal stresses.
Internal ventilation via curved fins to dissipate heat.
Replaceable pads to maintain a two-piece mounting.
Left/right pair identified for mounting.
Aluminum rotors to control the unsprung mass and rotating mass of the conversion kit.

## Features

- Product type: Brake disc on a Bol
- Diameter in mm: 394
- Position: Avant
- Thickness: 36