This GiroDisc two-piece brake rotor set is engineered for the exact brake configuration shown below. Its reusable aluminum hats and replaceable cast-iron friction rings reduce service waste while preserving the factory caliper relationship when the application notes are followed.
Key Features
- Two-Piece Design: 6061-T6 aluminum hat with high-carbon ductile iron friction ring reduces rotating mass by 4.8 lbs per rotor compared to OEM 29.3 lbs.
- Precision Engineering: 380mm OD 36mm thickness 82mm height with floating hardware for thermal expansion and zero distortion.
- Corrosion Protection: 300 series stainless steel drive buttons and bushings ensure long-term durability in harsh conditions.
- Direct Replacement: Bolt-on fit retains OEM caliper pads and hardware compatibility for 2014-2020 F8X chassis.
- 72 Curved Vane Slotted Rotor: Directional slots clear brake gases improve pad bite and manage heat for repeated high-performance stops.
- Includes all Girodisc hardware bolts and bushings for complete assembly.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2016-2021 | BMW | M2 | F87 exact brake package required |
| 2015-2018 | BMW | M3 | F80 exact brake package required |
| 2015-2020 | BMW | M4 | F82 or F83 exact brake package required |
Specifications
| Brand | GiroDisc |
|---|---|
| Manufacturer Part Number | A1-186 |
| Product Type | Two-Piece Brake Rotor Set |
| Position | Front |
| Fitment Type | Vehicle specific |
What's Included
The axle set, assembled hats and friction rings, and only the hardware GiroDisc supplies for this exact part number
About GiroDisc
GiroDisc designs and manufactures serviceable two-piece brake rotors, replacement rings, and related brake components in Bellingham, Washington. Selection remains exact-part-number and brake-configuration specific.
Related GiroDisc Products
- GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 368mm Slotted Rear Rotors
- GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 380mm Slotted Front Rings
- GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Blue Calipers) 380mm Front Caliper Rebuild Kit
Browse the GiroDisc collection for related brake components.
Frequently Asked Questions
Will this fit my 2016-2021 BMW M2?
That year, make, and model range is listed, but the exact trim, axle position, rotor dimensions, caliper, brake package, and every application note must also match.
Can I use my factory calipers and brake pads?
Many GiroDisc rotor sets retain the factory calipers, but some iron conversions require a different pad shape or compound. Follow the exact application note for this part number.
Are these rotors sold individually or as a pair?
GiroDisc commonly sells these assemblies as an axle pair, but confirm the quantity shown for this exact part number before ordering.
Installation Instructions
Follow the current GiroDisc instructions and vehicle service information. Confirm the brake package and rotor direction, clean mounting surfaces, inspect hubs and calipers, torque all fasteners to the specified values, verify clearance, and complete the required pad-bedding procedure before normal use.
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