MMX Carbon Ceramic Rear Rotor Conversion 370x24mm for G8X BMW M2 / M3 / M4
The MMX G8X M2 M3 M4 Carbon Ceramic Rear Rotor is the matching rear-axle component to MMX’s iron-to-CCB front conversion, bolting directly to the OE iron-brake hardware on the G87 M2, G80 M3, and G82 / G83 M4. On hard-driven G8X cars the rear axle is where steel rotors hit their thermal limit first; the carbon ceramic rear rotor flips that limit with dramatically lower operating temperatures, minimal fade across consecutive heavy braking events, and predictable brake balance from the first stop to the last lap of a hot session. At 4.45 kg per disc (46% lighter than the factory steel unit), the rear axle responds faster and the car feels lighter on its toes.
Features
- True iron-to-CCB rear conversion, bolts to the factory iron-brake calipers and hardware with no caliper swap, bracket changes, or recalibration
- Carbon ceramic construction runs dramatically cooler than steel with minimal fade under repeated heavy braking
- 46% lighter than the OE steel disc for reduced unsprung and rotating mass
- 2-piece floating design pairs the ceramic ring with a separate anodized black hat, eliminating the warping and cracking common to single-piece rotors
- Cross-drilled rotor face evacuates gas and pad material under hard use
- 1-year manufacturer warranty against defects in materials and workmanship
G8X M2 M3 M4 Carbon Ceramic Rear Rotor Specifications
- Dimensions: 370mm x 24mm
- Weight: 4.45 kg per disc (46% lighter than factory steel)
- Construction: 2-piece floating (carbon ceramic rotor ring + separate hat)
- Hat finish: Anodized black
- Rotor face: Cross-drilled
Applications
- BMW M2: G87 | 2023 to present
- BMW M3: G80 | 2021 to present
- BMW M4: G82, G83 | 2021 to present
Notes
- Fits G8X M cars equipped with factory iron brakes only. Cars equipped with factory carbon ceramic brakes (CCB) cannot use this rotor as a direct bolt-on.
- Pairs with the matching 380x36mm front carbon ceramic rotor (MMR30-1603F) for a full iron-to-CCB conversion, and with the Pagid RSL29 carbon ceramic rear pad set (MMR27-1610-R).
- Contact us with your build details if you are unsure of your factory brake configuration.
Frequently Asked Questions
Does this require new calipers or brackets?
No. The G8X M2 M3 M4 Carbon Ceramic Rear Rotor is a direct plug-and-play upgrade for the factory iron-brake hardware.
My car has factory carbon ceramic brakes. Will this fit?
No. This is an iron-to-CCB conversion product designed only for cars that left the factory with iron brakes.
Why upgrade the rear axle to carbon ceramic?
The rear discs are smaller and concentrate heat faster, so they are usually the first to fade on track. Carbon ceramic keeps rear temperatures and brake bias consistent through extended sessions.
What pads are recommended?
MMX pairs these rotors with the Pagid RSL29 carbon ceramic pad compound, developed specifically for MMX carbon ceramic discs.
How much weight does it save?
Each disc weighs 4.45 kg, a 46% reduction versus the factory steel unit.
Can I run the rear conversion without the front?
We recommend converting both axles together to keep thermal behavior and brake balance consistent. Pair it with the matching 380x36mm front rotor for the complete conversion.
About MMX Performance
MMX Performance is a UK-based specialist in performance parts for BMW and MINI vehicles, crafting high-quality upgrades that blend precision engineering, rigorous testing, and motorsport heritage. Driven by enthusiast culture, MMX designs its products in the UK, often putting them through track validation, to ensure durability, fitment accuracy, and on-road performance. Their catalog spans drivetrain components, spacers, hardware, and chassis enhancements, all tailored to elevate both the driving experience and visual appeal of BMW and MINI models.
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