BMW F31 Configuration and Parts
| Build item | Confirmed setup |
|---|---|
| Vehicle | BMW 3 Series Touring (F31) |
| Upgrade scope | Front-axle rotor-and-pad conversion |
| Existing calipers | Alcon CAR97 six-piston calipers retained |
| Front rotors | STOPFLEX 380mm continuous-fiber CCB rotors |
| Brake pads | STOPFLEX CCB-specific pads |
| Hardware | Mounting bolts and fasteners |
Fitment note: This is a front-axle rotor-and-pad conversion built around the existing Alcon CAR97 six-piston calipers; confirm the rotor dimensions, hat offset, pad shape, and wheel clearance before ordering.
Why This Front CCB Conversion Makes Sense
| STOPFLEX feature | Why it matters on this BMW F31 | What you notice |
|---|---|---|
| Keep the Alcon six-piston calipers | The existing CAR97 hardware already provides the multi-piston front setup, so the conversion targets the iron rotors, pads, and mounting hardware. | You preserve the caliper investment instead of buying another complete front brake kit. |
| Continuous-fiber C/SiC construction | Continuous carbon fibers carry load across the rotor body through repeated heating and cooling cycles. | A CCB rotor structure designed for strength and thermal durability rather than short-fiber construction. |
| High-temperature stability | Long descents and repeated hard braking can build enough heat to move an iron setup toward fade. | A more stable bite point and pedal travel as brake temperature rises. |
| About half the weight of an equivalent iron disc | Each front rotor is both rotating mass and unsprung mass, directly affecting how the front axle responds. | Sharper steering response and a suspension that settles broken pavement more cleanly. |
| Low visible dust with matched pads | Iron rotors and pads can coat light-colored or open-spoke wheels soon after a wash. | Wheels stay clean for weeks of street driving instead of days. |
| Long street-service life | Frequent iron-rotor replacement adds parts, labor, and downtime over long-term ownership. | Street-use life can reach about 250,000-300,000 km with matched pads and correct bedding when the rotors are not used on track. |
What gets better
- The proven Alcon CAR97 calipers stay on the car.
- Visible wheel dust drops with the matched rotor-and-pad pairing.
- Front-axle rotating and unsprung mass is reduced.
- Thermal consistency improves during repeated hard braking.
- Street rotor replacement intervals can extend substantially.
What to confirm first
- Exact F31 model, trim, year, and VIN.
- Alcon CAR97 caliper part number and mounting position.
- Current rotor diameter, thickness, hat offset, and mounting pattern.
- Wheel diameter, barrel clearance, and spoke clearance.
- Street, mountain-road, or track-use priorities.
If your F31 uses a different Alcon configuration, send us the car and brake details and we'll confirm fitment before you order through our BMW CCB collection.
Build Gallery
BMW F31 CCB Upgrade FAQ
Can I keep the Alcon CAR97 calipers on a BMW F31 CCB upgrade?
Yes. This front-axle conversion retains the existing Alcon CAR97 six-piston calipers and replaces the front iron rotors with 380mm STOPFLEX CCB rotors, matched pads, and mounting hardware.
Is this a full front-and-rear carbon-ceramic conversion?
No. The confirmed scope is the front axle only: two 380mm STOPFLEX CCB rotors, STOPFLEX CCB-specific pads, and mounting hardware used with the existing Alcon calipers.
Can I reuse pads made for iron rotors?
Use the STOPFLEX CCB-specific pads supplied for this conversion. The pad shape must match the CAR97 caliper, and the compound must be suitable for the ceramic rotor.
How long can STOPFLEX CCB rotors last on the street?
Street-use life can reach about 250,000-300,000 km with matched pads, correct bedding, and normal road use. Track use and repeated extreme heat cycles change the wear rate.
What details are needed before ordering this BMW F31 conversion?
Confirm the exact F31 model and trim, VIN, CAR97 caliper part number, current rotor dimensions and hat offset, wheel size and clearance, and intended street or track use.
