2024-2026+ Zeekr X 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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2024-2026+ Zeekr X CCB Big Brake Kit — Genuine Alcon RC6 6-Piston Caliper Front + Genuine Alcon RC4 4-Piston Caliper Rear Setup
The 2024-2026+ Zeekr X is a compact EV with strong regenerative braking, but repeated high-speed stops still put heat into the friction brakes and make wheel dust visible on open 19- and 20-inch designs. This StopFlex kit replaces the factory brake package with 380 mm front and rear carbon-ceramic rotors, Genuine Alcon RC6 6-Piston Caliper front calipers, and Genuine Alcon RC4 4-Piston Caliper rear calipers for higher thermal capacity, lower brake dust, and reduced rotating mass versus comparable iron rotors. Each kit is built around the confirmed Zeekr X trim and wheel package, so rotor-hat offset, bracket geometry, brake-line routing, and spoke clearance are checked before production.
- 380 mm front and rear carbon-ceramic rotors require 19-inch or larger wheels on the Zeekr X; wheels under 19 inches will not clear the rotor package, and spoke clearance must still be checked.
- The front axle uses the exact Genuine Alcon RC6 6-Piston Caliper, paired with a 380 mm rotor to add heat capacity for a heavy, quick-accelerating compact EV.
- The rear axle uses the Genuine Alcon RC4 4-Piston Caliper with a 380 mm rotor so rear braking contribution is engineered with the front upgrade instead of treated as a cosmetic match.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Zeekr X |
| Model years | 2024-2026+ |
| 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, giving the Zeekr X a six-piston fixed-caliper layout that spreads pad load across the rotor face for more consistent clamping and pedal response than a smaller sliding-caliper setup. Alcon is a recognized performance brake manufacturer, and this genuine caliper is selected as the primary front upgrade rather than a cosmetic caliper cover or generic casting. StopFlex engineers the caliper mount, rotor hat, and line package around the customer's confirmed Zeekr X trim and wheel clearance.
Rear Caliper (Balance)
The rear axle uses the Genuine Alcon RC4 4-Piston Caliper with a matching 380 mm carbon-ceramic rotor to support stable brake balance under hard deceleration. Because the Zeekr X uses a factory electronic parking brake with auto-hold, rear fitment and EPB compatibility must be confirmed against the customer's exact trim before the kit is built.
Front & rear, engineered together: A 380 mm front-only conversion can move brake torque and thermal capacity forward without addressing rear contribution. This StopFlex kit is engineered as a front-and-rear system so the RC6 front and RC4 rear calipers, pad set, rotor diameters, hats, and lines work as a matched brake package on the confirmed Zeekr X configuration.
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. |
EPB & Rear Caliper Options
This vehicle leaves the factory with an electronic parking brake (EPB) built into the rear brake, so the rear of the kit is built to keep that EPB working. There are two rear paths. The first is a dual-caliper rear: a main performance caliper handles braking while a dedicated EPB actuator caliper is retained alongside it, so the electronic parking brake, auto-hold, and hill-start assist all keep working; on this path the rear performance caliper can be the TTSPORT EP4 / EP4S 4-piston caliper. The second is an EPB-integrated caliper, a single rear caliper with the electromechanical parking-brake motor built in for a cleaner install with fewer parts behind the wheel; on this path the rear is the TTSPORT EP4 / EP4S 4-piston caliper with integrated EPB. Which path fits best depends on your exact trim and EPB configuration, your budget, your appearance preference, and your wheel size and spoke clearance. Confirm your car's rear-brake configuration with StopFlex before ordering so the correct EPB-compatible rear option is built for your kit.
| Rear option | What it is | Rear caliper | Best when |
|---|---|---|---|
| Dual caliper (EPB retained) | Performance caliper plus a dedicated EPB actuator caliper, both fitted on the rear, so the factory electronic parking brake keeps working. | TTSPORT EP4 / EP4S 4-Piston Caliper | You want guaranteed factory EPB, auto-hold, and hill-start behavior preserved. |
| EPB-integrated caliper | A single rear caliper with the electromechanical parking-brake motor built in, for a cleaner install with fewer parts behind the wheel. | TTSPORT EP4 / EP4S 4-Piston Caliper with integrated EPB | You want a cleaner single-caliper rear with full EPB function. |
FAQ
Will this 380 mm kit fit my exact Zeekr X trim?
Fitment is not assumed from the Zeekr X platform name. StopFlex confirms your exact year, market, trim, drivetrain, hub geometry, wheel size, wheel offset, and current brake package before engineering the brackets, rotor-hat offsets, caliper mounts, and lines.
What wheel size is required?
The largest rotor in this Zeekr X kit is 380 mm, so 19-inch wheels are the minimum. Wheels smaller than 19 inches will not clear the rotor, and spoke clearance still has to be checked against the Genuine Alcon RC6 6-Piston Caliper and RC4 rear caliper profile.
Will the electronic parking brake and auto-hold still work?
The Zeekr X model family is specified with an electronic parking brake and auto-hold, so StopFlex treats rear caliper and EPB integration as a required fitment item. Final compatibility is confirmed against the customer's exact trim and rear brake configuration before production.
Why choose carbon-ceramic rotors on a Zeekr X instead of iron rotors?
Carbon-ceramic rotors reduce brake dust, cut rotating mass versus comparable iron rotors, and tolerate repeated heat cycles better during fast road or track-style braking. On the Zeekr X, the 380 mm front and rear package also gives the brake system more thermal capacity than a smaller factory-style friction setup.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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