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Two-Piece Fully Floating Rear Brake Rotors for the Ford Focus RS Mk3 Built Entirely in the USA
The GiroDisc GIRA2-169 is a pair of 2-piece fully floating rear brake rotors engineered for the Ford Focus RS Mk3 (2016-2018). Each rotor pairs GiroDisc's proprietary cast iron disc, poured and machined entirely in the USA, with a 6061-T6 aircraft-specification aluminum hat section for significant unsprung weight reduction over the OEM cast iron unit. The floating mount system using 10 high-strength cadmium-plated alloy steel drive pins allows thermal expansion without warping, eliminating the heat-induced brake pedal pulsation common with conventional one-piece rotors during hard track use.
Key Features
- 2-piece fully floating rear brake rotor design for the Ford Focus RS Mk3
- Proprietary cast iron disc poured and machined in-house at GiroDisc in the USA
- 6061-T6 aircraft specification aluminum hat for reduced unsprung and rotating mass
- 10 high-strength alloy steel cadmium-plated drive pins for thermal float
- Slotted disc design improves bite, outgassing, and pad face cleaning under heavy braking
- Direct bolt-on replacement for OEM Focus RS rear rotors, no modifications required
- Compatible with OEM and aftermarket Focus RS rear calipers
- Significantly reduced warping and pedal pulsation compared to one-piece rotors
- Sold as a pair (both rear rotors included)
- Designed, manufactured, and assembled in the USA by GiroDisc
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2016-2018 | Ford | Focus | RS |
Specifications
| Detail | Value |
|---|---|
| Part Number | GIRA2-169 |
| Brand | GiroDisc |
| Position | Rear (pair) |
| Rotor Type | 2-piece fully floating, slotted |
| Hat Material | 6061-T6 Aircraft Spec Aluminum |
| Disc Material | Proprietary cast iron (USA-sourced and machined) |
| Drive Pins | 10x high-strength alloy steel, cadmium plated |
| Mount Style | Fully floating |
| Quantity | Sold per pair (both rear rotors) |
| Country of Manufacture | USA |
| UPC | N/A |
What's Included
- 2x GiroDisc GIRA2-169 2-piece rear brake rotors (complete pair)
- Drive pins pre-installed
About GiroDisc
GiroDisc designs, manufactures, and sells 2-piece fully floating brake rotors from their facility in the United States. Every rotor is produced entirely in-house using US-sourced materials, from raw iron poured in their own foundry to final machining and assembly. GiroDisc products are trusted by professional racing teams and track day enthusiasts who demand consistent brake performance under sustained high-temperature conditions.
Frequently Asked Questions
What years does the GIRA2-169 fit the Ford Focus RS?
The GIRA2-169 fits the Ford Focus RS Mk3 produced from 2016 through 2018. The Mk3 Focus RS was only sold in the US for these three model years. Confirm your Focus RS is the third-generation RS before ordering.
What is the advantage of a 2-piece floating rotor over a conventional one-piece rotor on the Focus RS?
A conventional one-piece rotor expands as a single unit when heated, creating internal stress that can cause warping and pedal pulsation. The GIRA2-169's floating design allows the iron disc to expand independently of the aluminum hat, eliminating thermally induced distortion during sustained track use. The aluminum hat also significantly reduces unsprung weight compared to a full cast iron one-piece rotor.
Will the GIRA2-169 work with the stock Focus RS rear brake calipers?
Yes. The GIRA2-169 is a direct bolt-on replacement that bolts to the OEM Focus RS hub and works with the factory rear brake calipers. No caliper modifications, spacers, or adapters are required.
Are GIRA2-169 rotors street legal?
Yes. GiroDisc 2-piece rotors are street legal and work equally well for daily driving and track use. They are quiet, produce no additional vibration on the street, and function normally with any approved brake pad compound.
Do GiroDisc rear rotors require a break-in procedure?
Yes. GiroDisc recommends a bedding procedure to properly transfer pad material to the rotor surface. Perform 8-10 moderate stops from 60 mph to 10 mph, avoiding complete stops, then allow the brakes to cool. Follow with 3-4 more aggressive stops from 80 mph. This procedure seats the pad and rotor surfaces for consistent performance.
Can I use any brake pad with the GIRA2-169?
Yes. The GIRA2-169 is compatible with any brake pad compound including OEM, street performance, and track-compound pads. For track use, match the pad compound to the expected brake temperature range for best performance and longevity.
What is the warranty on GiroDisc GIRA2-169 rotors?
GiroDisc stands behind their rotors against defects in materials and workmanship. Contact GiroDisc directly for specific warranty terms applicable to the GIRA2-169. The rotor rings are a wear item and are replaceable separately if the ring wears out before the hat, extending the overall service life and reducing replacement cost.
Are the GIRA2-169 replacement rings available separately?
Yes. GiroDisc sells replacement rotor rings separately, which means when the iron disc surface is worn you only need to replace the rings rather than the full 2-piece assembly. This significantly reduces long-term operating costs compared to replacing full one-piece rotors.
Installation Overview
- Safely lift and support the vehicle, remove the rear wheels
- Remove rear brake calipers and caliper brackets, hang with wire to avoid strain on brake lines
- Remove the OEM rear rotors from the hub
- Install the GIRA2-169 GiroDisc onto the rear hub, aligning bolt holes
- Reinstall caliper brackets and calipers, torque all bolts to factory specification
- Reinstall wheels and lower the vehicle
- Perform the GiroDisc bedding procedure: 8-10 moderate stops from 60 mph, cool, then 3-4 more aggressive stops
- Allow full cool-down before resuming normal driving or track use
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
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