# Girodisc Front Brake Discs 370x34 for Audi RS3 (8V) Sedan (2017–2020)

> Pair of Girodisc front disks, 370 × 34 mm, part no.: A1-180. High-performance floating brake discs on an aluminum hub for the Audi RS3 (8V) Sedan (2017–2020).

- URL: https://www.gt2i.ch/en/brake-disk-for-bell/224553-girodisc-front-brake-discs-370x34-for-audi-rs3-8v-sedan-20172020-3666618858784.html
- Reference: GIRO-A1-180
- Price: CHF 1,394.16
- Brand: GIRODISC
- Availability: out of stock

## Description

The Girodisc A1-180 front brake discs, measuring 370 × 34 mm, optimize consistent braking performance during spirited driving in the Audi RS3 (8V) Sedan (2017–2020). Their cast-iron rotors and aluminum hubs form a floating assembly designed to manage thermal stress and facilitate rotor replacement due to wear. Sold in pairs, with one left-hand rotor and one right-hand rotor.
These rotors are intended for the front axle of compatible vehicles in the configuration specified below. They retain the compatible 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. 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 pads. 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 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 in heavy-duty uses and offer a choice of trims to tailor bite and pedal reaction to the intended use.
Specifications for Girodisc A1-180 rotors for compatible vehicles
Brand: Girodisc
PartNumber: A1-180
Position: front
Sizes (diameter × thickness): 370 × 34 mm
Vehicles and models: Audi RS3 (8V) Sedan (2017–2020)
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: D1-180. Verify compatibility with the caliper generation before replacement.
Internal ventilation: directional curved fins
Minimum thickness: 32 mm
Overall height: 52.8 mm
Original rotor diameter: 370 mm
Weight / weight reduction: Comparison stated in the manufacturer’s specifications: approximately 10.89 kg per disc versus 12.43 kg for the original, for a weight savings of 1.54 kg per disc (3.08 kg per pair).
Manufacturing of main components: United States
Vehicles compatible with Girodisc part number A1-180
Audi RS3 (8V) Sedan (2017–2020)
Audi RS3 (8V) Sedan (2017–2020): Compatible with versions equipped with or without carbon-ceramic brakes on the front.
Each application is subject to its specific brake system, calipers, and any requirements for brake pads or spacers. Please verify these conditions before ordering.
Girodisc A1-180 Mounting Requirements
Audi RS3 (8V) Sedan (2017–2020): Compatible with models with or without carbon-ceramic front brakes.
Brake Pads and Brake System for Compatible Vehicles
Choose brake pads whose shape is compatible with the calipers, track, and/or the A1-180 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 a mounting compatible with the original hydraulic system.
Maintenance of the Girodisc mounting on compatible vehicles
Replacing the pads alone helps keep the 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 A1-180 for compatible vehicles
What are the sizes of the A1-180 discs for my vehicle? The part number shown measures 370 × 34 mm and is mounted on the front 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 are shipped with their disc bells.
Do I need to replace the brake pads on my vehicle?Yes. Always install new brake pads with new rotors or new brake pads. Their shape and compound must be compatible with the A1-180 rotor and/or braking surfaces and the calipers. Then break in the rotors and pads according to the prescribed procedures.
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 A1-180 Bowl Brake Discs
370 × 34 mm size for front braking on compatible vehicles.
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: 370
- Position: Avant
- Thickness: 34