2011-2019 BMW 1 Series (F20/F21) CCB Big Brake Kit | Alcon RC6 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2011-2019 BMW 1 Series (F20/F21) CCB Big Brake Kit — Genuine Alcon RC6 6-Piston Caliper Front + Genuine Alcon RC4 4-Piston Caliper Rear Setup
The F20/F21 BMW 1 Series is light enough to expose brake feel changes immediately, and tuned M135i/M140i or track-driven standard trims can overheat factory iron brakes long before the chassis is finished. This StopFlex kit uses 380 mm carbon-ceramic rotors with a Genuine Alcon RC6 6-Piston Caliper in front and a Genuine Alcon RC4 4-Piston Caliper in the rear to add heat capacity, reduce rotating mass, cut brake dust, and keep the brake package visually proportional behind 19-inch or larger wheels. Every bracket, rotor-hat offset, and caliper position is built for the confirmed F20/F21 trim, not assumed from the shared 1 Series chassis name.
- 380 mm front and rear carbon-ceramic rotors require 19-inch or larger wheels on the BMW F20/F21; inner barrel and spoke clearance are checked before production.
- The front axle uses the exact Genuine Alcon RC6 6-Piston Caliper specified for this kit, matched to 380 mm carbon-ceramic rotors for repeated high-speed braking and stable pedal response.
- F20/F21 standard models and M135i/M140i variants can differ in front upright, hub, and wheel offset details, so StopFlex builds brackets and hat offsets to the buyer’s confirmed trim.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | BMW 1 Series (F20/F21) |
| Model years | 2011-2019 |
| Front setup | Genuine Alcon RC6 6-Piston Caliper / 380mm |
| Rear setup | Genuine Alcon RC4 4-Piston Caliper / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 19" (for the 380 mm front rotor) |
Every StopFlex kit is bespoke-engineered for your exact model and trim — the brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, not assumed from the platform. This matters because trims that share a chassis name can differ mechanically: a pure M or performance variant often carries different front knuckles/uprights, hub geometry, and wheel axial (ET) clearance than the standard models in the same family, so a bracket and hat offset that bolt onto one are not the same parts that fit the other. StopFlex supplies the calipers, pads, rotor hats, floating hardware, and brake lines as a matched system built to your confirmed trim. Cars with modified knuckles, modified uprights, or non-factory suspension mounting points must be reviewed before ordering and are not treated as direct-fit.
This setup uses a 380 mm front rotor, so the minimum wheel size is 19". Wheels under 19" will not clear the caliper and rotor, and spoke profile and offset affect clearance too — confirm your exact wheels before ordering.
| Wheel Size (Standard) | Disc Range |
|---|---|
| 15" | 260 mm – 285 mm |
| 16" | 285 mm – 300 mm |
| 17" | 300 mm – 330 mm |
| 18" | 330 mm – 355 mm |
| 19" | 355 mm – 380 mm |
| 20" | 380 mm – 400 mm |
| 21" | 400 mm – 420 mm |
| 22" | 420 mm – 440 mm |
Caliper Overview — Front & Rear Balance
Front Caliper (Primary Upgrade)
The front axle uses the Genuine Alcon RC6 6-Piston Caliper, which spreads clamping load across the pad for stronger bite and a firmer, more linear pedal than a smaller factory sliding-caliper layout. Alcon is a recognized motorsport and performance brake supplier, and this genuine fixed caliper gives the F20/F21 front axle the stiffness needed to control a 380 mm carbon-ceramic rotor. StopFlex positions the caliper with trim-specific brackets so pad sweep, rotor centering, and wheel clearance match the customer’s exact car.
Rear Caliper (Balance)
The rear axle uses the Genuine Alcon RC4 4-Piston Caliper with a 380 mm carbon-ceramic rotor to keep rear brake torque and thermal capacity matched to the upgraded front axle. Because the F20/F21 uses a manual cable-style parking brake rather than factory EPB, rear parking-brake function must be confirmed against the exact rear assembly during kit engineering.
Front & rear, engineered together: A 380 mm front-only conversion can move the F20/F21 brake balance forward and leave the rear axle thermally mismatched during repeated stops. This kit is engineered as a front-and-rear system so piston area, rotor diameter, hat offset, pad selection, and line routing are specified together for the confirmed trim.
Make It Yours — Color & Logo Customization
Every StopFlex kit-upgrade order can be finished with custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the brake package matches your exact build instead of a fixed off-the-shelf look.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
Why StopFlex CCB
Lower Unsprung Mass
StopFlex carbon-ceramic rotors are engineered to reduce rotor mass versus comparable iron discs, helping the suspension react cleaner and the steering feel more precise.
High-Temperature Stability
The carbon-silicon-carbide matrix is built for stable braking behavior at temperatures that can push iron rotors into heavy fade.
Rust-Free Rotor Surface
Carbon ceramic does not form orange flash rust after rain, washing, or storage, keeping the visible rotor face cleaner behind open wheels.
Long Street-Service Potential
In normal road use with matched pads and proper bedding, StopFlex CCB rotors are designed for far longer service life than typical iron replacement rotors.
Low Visible Dust
When paired with matched StopFlex pads, the system produces very low visible brake dust compared with conventional iron rotor and pad combinations.
Premium Ceramic-Glaze Appearance
StopFlex's proprietary coating creates a bright, high-end ceramic-glaze finish with subtle glaze texture and a more premium visual character behind open wheels.
Street-Usable Cold Bite
Street Spec and Track-Day Spec rotors are designed for normal first-stop road use, including cold-weather operation. Motorsport Spec is the competition-focused exception.
Continuous Fiber Reinforcement
Long-fiber carbon ceramic construction improves structural strength and thermal durability versus chopped-fiber approaches.
Heat Management Note
Carbon ceramic rotors tolerate extreme surface temperature, but they do not remove every heat-management requirement. During repeated hard stops, heat can still soak into pads, fluid, seals, calipers, wheels, and nearby components. For long track sessions, mountain descents, or sustained aggressive driving, brake cooling and high-temperature fluid are still recommended.
Street / Track-Day / Motorsport Rotor Options
Street Spec
Ceramic coating, cross-drilled face, and large cooling channels.
Best for daily driving and premium street builds that need clean cold bite, low dust, corrosion-free appearance, and long service life.
Track-Day Spec
Ceramic coating, blank face, and honeycomb cooling channels.
Best for fast-road and track-day use where repeated braking stability matters more than maximum visual drilling style.
Motorsport Spec
Uncoated blank face with honeycomb cooling channels.
Best for race-focused builds that run competition pads, high-temperature fluid, cooling strategy, and a proper warm-up window. Not the default street choice.
Package Scope
| Item | Details |
|---|---|
| Front calipers | Genuine Alcon RC6 6-Piston Caliper |
| Front CCB rotors | 380mm |
| Rear calipers | Genuine Alcon RC4 4-Piston Caliper |
| Rear CCB rotors | 380mm |
| CCB brake pads | Matched for the supplied StopFlex carbon ceramic rotors |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| Color customization | Custom caliper colors, a custom caliper logo, and custom rotor hat colors are available for every kit-upgrade order. |
| Order scope | Default listing is full-car set when front and rear are specified. Front-only or rear-only orders can be arranged after confirmation. |
FAQ
Will this 380 mm kit fit my exact F20 or F21 trim?
Fitment is confirmed per vehicle, not by platform name. StopFlex verifies the exact year, body style, trim, front knuckle/upright, hub geometry, existing brake package, wheel diameter, wheel offset, and spoke clearance before machining brackets and rotor hats.
What wheel size do I need for the 380 mm rotors?
This kit requires 19-inch or larger wheels because the largest rotor is 380 mm. Wheel diameter alone is not enough; inner barrel shape, spoke profile, wheel offset, and caliper face clearance must also be checked against the Genuine Alcon RC6 front caliper.
Does this BMW 1 Series kit retain an electronic parking brake?
The F20/F21 1 Series does not leave the factory with an EPB; it uses a manual handbrake lever and cable-style parking brake. StopFlex confirms the rear parking-brake arrangement on the customer’s exact car before finalizing the rear package.
Why choose carbon-ceramic rotors over the factory iron brakes on an F20/F21?
Carbon-ceramic rotors reduce rotating and unsprung mass, produce far less visible dust on open wheels, and tolerate repeated heat cycles better than standard iron rotors when the car is used hard. On a tuned M135i/M140i or track-driven 1 Series, the main payoff is heat control without adding unnecessary wheel weight.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
More Contact Information
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