2024-2026+ BMW X2 (U10) Carbon Ceramic Big Brake Kit — Brembo GT6 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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Will This Fit My Car?
Full Upgrade CCB Big Brake Kits (With Calipers) for the 2024-2026+ BMW X2 (U10). This page's exact brake setup:
| Model Years | Front Setup | Rear Setup | Min. Wheel Size |
|---|---|---|---|
| 2024-2026+ |
Option 1: Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor Option 2: Brembo GT | M6 6-Piston Caliper — 380 mm rotor Option 3: Brembo GT | S6 6-Piston Caliper — 380 mm rotor |
Option 1: Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355/380 mm rotor Option 2: Brembo GT | M4 4-Piston Caliper — 355/380 mm rotor Option 3: Brembo GT | S4 4-Piston Caliper — 355/380 mm rotor |
19" |
Every StopFlex kit is bespoke-engineered for your exact model and trim — brackets, rotor-hat offsets, and caliper mounting are matched to your specific car, never assumed from the platform. Trims that share a chassis name can differ mechanically: a pure performance variant often carries different knuckles, hub geometry, and wheel ET clearance than the standard models, so parts that bolt onto one are not the parts that fit the other. Calipers, pads, rotor hats, floating hardware, and brake lines ship as one matched system built to your confirmed trim. Modified knuckles, uprights, or non-factory suspension mounting points must be reviewed before ordering.
The 380 mm rotor sets the minimum wheel size at 19" — smaller wheels will not clear the caliper and rotor. Spoke profile and offset also affect clearance; 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 |
What's in the Box
| Item | Details |
|---|---|
| Product type | Full Upgrade CCB Big Brake Kits (With Calipers) |
| Front calipers |
Option 1: Brembo OEM Cadillac CTS-V 6-Piston Caliper — 380 mm rotor OE / Part No.: L 172-2521 · R 172-2522 Option 2: Brembo GT | M6 6-Piston Caliper — 380 mm rotor Option 3: Brembo GT | S6 6-Piston Caliper — 380 mm rotor |
| Rear calipers | Option 1: Brembo OEM Cadillac CTS-V 4-Piston Caliper — 355 / 380 mm rotor Option 2: Brembo GT | M4 4-Piston Caliper — 355 / 380 mm rotor Option 3: Brembo GT | S4 4-Piston Caliper — 355 / 380 mm rotor OE / Part No.: L 172-2523 · R 172-2524 |
| CCB brake pads | Matched ceramic-compatible compound for the supplied StopFlex carbon ceramic rotors |
| Rotor hats and floating hardware | Vehicle-specific hardware package |
| Brake lines | Included for complete kit-upgrade orders |
| 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. |
Make It Yours — Color & Logo Customization
Any kit order can be personalized: custom caliper colors, a custom caliper logo, and custom rotor hat colors, so the hardware behind your wheels matches the rest of the build.
- Custom caliper color
- Custom caliper logo
- Custom rotor hat color
Why Carbon Ceramic — and Why StopFlex
Long Street-Service Life
In normal road use with matched pads and correct bedding, one StopFlex CCB rotor set is engineered to outlast several sets of iron replacement rotors, recovering part of the up-front cost.
Low Visible Dust
Matched with StopFlex pads, the system sheds a fraction of the dust an iron rotor and pad combination throws. Wheels stay clean for weeks of driving instead of days.
Premium Ceramic-Glaze Finish
StopFlex's proprietary coating gives the disc a bright ceramic-glaze surface with subtle texture — the factory carbon-ceramic look, clearly visible through open wheel designs.
Continuous Fiber Construction
StopFlex discs are built with long continuous carbon fiber instead of chopped short fiber. Continuous strands carry load across the whole rotor body, raising strength and thermal durability under heat cycles.
Bespoke Per-Vehicle Engineering
Every order is machined to the confirmed vehicle and trim. Brackets, hat offsets, and pad shapes are built for that exact car — never pulled from a one-size-fits-all catalog.
CCB-Specific Pad Compound
A low-metallic resin pad compound reinforced with steel, copper, and aramid fiber, made for ceramic discs: stable to about 750 °C, roughly 0.44 average friction, strong fade resistance, low rotor wear.
Lower Unsprung Mass
A carbon-ceramic rotor weighs roughly half of the equivalent iron disc. Less rotating, unsprung mass lets the suspension follow broken pavement more cleanly and makes steering response noticeably sharper.
High-Temperature Stability
The carbon-silicon-carbide friction matrix keeps working at temperatures that push iron rotors into heavy fade, so the tenth hard stop feels like the first — same pedal travel, same bite point.
Rust-Free Rotor Surface
Ceramic discs cannot flash-rust. After rain, a wash, or weeks of parking, the rotor face behind your open-spoke wheels stays clean — no orange ring on a freshly detailed car.
Winter & Cold-Weather Braking
Cold facts first: an untuned ceramic disc bites less than iron on a freezing morning — physics, not a defect. StopFlex tuned both the pad compound and the disc's ceramic coating for cold starts, so winter cold-car braking now feels very close to summer. Leave extra margin on the very coldest first stops; severe-climate daily drivers should build Street Spec.
Caliper Overview
Front Caliper
The front runs Brembo's 6-piston caliper over a 380 mm carbon-ceramic rotor, and you pick the exact caliper: V6 (OEM Cadillac CTS-V), GT6 (Brembo GT | M6), or GTS6 (Brembo GT | S6). All three deliver even, six-point clamp loading so pedal effort stays consistent on repeated hard stops.
Rear Caliper
The rear pairs a Brembo 4-piston caliper with a 355 or 380 mm carbon-ceramic rotor — choose V4 (OEM Cadillac CTS-V), GT4 (Brembo GT | M4), or GTS4 (Brembo GT | S4). It adds rear thermal capacity for downhill and repeated braking, and the mounting retains the X2's factory electronic parking brake function.
Choose Your Rotor: Street, Track-Day, or Motorsport
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.
Heat Management Note
High rotor temperature tolerance does not mean heat management disappears. Under repeated hard braking, heat migrates into the pads, brake fluid, seals, calipers, and wheels even when the ceramic disc itself is comfortable. Plan brake cooling and high-temperature fluid for extended track sessions, long mountain descents, or sustained aggressive driving.
Get Your Fitment Confirmed
Share your year, model, trim, wheel size, current rotor dimensions, and caliper type — every order is verified against your VIN-level configuration before it goes to production.
FAQ
How do these carbon-ceramic brakes behave on a cold winter morning?
A cold carbon-ceramic disc naturally bites a little less than cold iron on the first stop — that is physics, not a fault. We tuned both the pad compound and the disc's ceramic coating for cold starts, so first-stop feel on a cold X2 now comes very close to summer feel. On the coldest days, still leave a bit of extra following distance for the first one or two stops until the discs come up to temperature.
Will this fit my exact X2 — the 20i, 28i, or the M35i?
Each kit is engineered to your confirmed trim, not the U10 platform in general. The M35i uses different front knuckle and hub geometry than the 20i and 28i, so the brackets, rotor-hat offsets, and caliper mounting are cut for the car you actually own. We never ship a one-size platform bolt-on; we build to your VIN-confirmed trim.
What wheels do I need to clear these rotors?
The front uses a 380 mm rotor, so the minimum wheel diameter is 19 inches. Wheels under 19 inches will not clear the caliper and rotor. Spoke shape also matters, not just diameter — send us your wheel details and we'll confirm caliper clearance before you order.
Does the kit keep my electronic parking brake working?
Yes. The 2024+ X2 uses a factory electronic parking brake, and the rear Brembo 4-piston caliper option is set up to retain that EPB function so your park brake and hold features work exactly as they do now.
More Contact Information
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