# Girodisc 390x32 Rear Brake Discs for Ferrari 488 Challenge Evo (2015–2019)

> Pair of Girodisc rear disc brake rotors, 390 × 32 mm, part no.: A2-285. High-performance floating brake discs on an aluminum hub for the Ferrari 488 Challenge Evo (2015–2019).

- URL: https://www.gt2i.ch/en/brake-disk-for-bell/224394-girodisc-390x32-rear-brake-discs-for-ferrari-488-challenge-evo-20152019-3666618857190.html
- Reference: GIRO-A2-285
- Price: CHF 2,418.95
- Brand: GIRODISC
- Availability: out of stock

## Description

The Girodisc A2-285 rear brake discs, measuring 390 × 32 mm, optimize braking consistency during spirited driving in the Ferrari 488 Challenge Evo (2015–2019). Their cast-iron rotors and aluminum hubs form a floating assembly designed to manage thermal stresses and facilitate rotor replacement due to wear. Sold in pairs, with one left-hand rotor and one right-hand rotor.
These discs are intended for the rear axle of compatible vehicles in the configuration specified below. They retain the compatible mounting calipers; any required spacers and brake pad specifications must be followed.
The curved internal cooling fins channel air through the rotor to dissipate heat during repeated braking. The floating mounting minimizes stresses caused by thermal expansion differences between the rotor and the housing and helps the rotor center itself between the brake pads, maintaining consistent contact under heat.
The hub is made of 6061-T6 aluminum. The high-strength steel drive pins are cadmium-plated to resist corrosion. Spring washers minimize cold-mounting noise while allowing the necessary compression for the floating mount.
New brake pads must be installed with new rotors or brake discs. Their shape and compound must match the mounting, cast iron, and intended use; follow the specific requirements for 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 track rotors. It allows you to remove and store the expensive original carbon-ceramic rotors to preserve them during intensive 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 in heavy-duty applications and offer a choice of linings to tailor bite and pedal reaction to the intended use.
Specifications for Girodisc A2-285 rotors for compatible vehicles
Brand: Girodisc
PartNumber: A2-285
Position: rear
Sizes (diameter × thickness): 390 × 32 mm
Vehicles and models: Ferrari 488 Challenge Evo (2015–2019)
Braking surface material: high-resistance cast steel
Packaging: Pair of complete rotors, one left and one right with disc bells.
Housing: 6061-T6 aluminum
Construction: two-piece floating mounting design
Catalog part number: D2-285. Verify compatibility with the caliper generation before replacement.
Internal ventilation: directional curved fins
Number of internal fins: 72
Minimum thickness: 30 mm
Manufacturing of main components: United States
Vehicles compatible with Girodisc part number A2-285
Ferrari 488 Challenge Evo (2015–2019)
Ferrari 488 Challenge Evo (2015–2019): Use D1001-shaped brake pads with a compound designed for cast-iron rotors. The original carbon-ceramic brake pads are not compatible.
Each application is subject to its specific brake system configuration, calipers, and any requirements for brake pads or spacers. Please verify these conditions before ordering.
Girodisc A2-285 Mounting Requirements
Ferrari 488 Challenge Evo (2015–2019): Use D1001-shaped brake pads with a compound designed for cast-iron rotors. The original carbon-ceramic brake pads are not compatible.
Brake Pads and Braking System for Compatible Vehicles
Choose brake pads whose shape is compatible with the calipers, the track, and/or the A2-285 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 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 compatible vehicles
Replacing the pads alone helps 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 each time you replace the pads.
FAQ — Girodisc A2-285 for compatible vehicles
What are the sizes of the A2-285 discs for my vehicle? The part number shown measures 390 × 32 mm and is mounted on the rear axle. The diameter alone is not sufficient: also check the brake system type 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 disc bells.
Do I need to replace my vehicle’s brake pads?Yes. Always install new brake pads with new rotors or new braking surfaces. Use a compound suitable for cast iron and your use. Use D1001-shaped brake pads with a compound designed for cast-iron rotors. The original carbon-ceramic brake pads are not suitable.
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 vehicle? Follow the Girodisc procedure and the brake pad manufacturer’s instructions to build up 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: an instruction manual for installing and breaking in the discs, and an instruction manual for installing new tracks on existing bowls. Consult the document that applies to your specific task before you begin.
Key Features of Girodisc A2-285 Bowl Brake Discs
390 × 32 mm size for rear braking on compatible vehicles.
6061-T6 aluminum rotor and floating mount to manage thermal stresses.
Internal ventilation via curved fins to dissipate heat.
Replaceable brake pads to maintain a two-piece mounting.
Left/right pair identified for mounting.
Aluminum housings to control the unsprung mass and rotating mass of the conversion kit.

## Features

- Product type: Brake disc on a Bol
- Diameter in mm: 390
- Position: Rear
- Thickness: 32