2020-2026+ Mercedes-Benz GLB-Class / AMG (X247) CCB Big Brake Kit | OEM AMG 6-Piston
Official Warranty: 1‑year free replacement for quality defects or coating issues under normal (non-track) use.
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2020-2026+ Mercedes-Benz GLB200 / GLB250 / GLB35 (X247) CCB Big Brake Kit — Genuine OEM AMG 6-Piston Caliper Front + TTSPORT EP4 4-Piston Caliper with EPB Rear Setup
GLB200, GLB250, and GLB35 X247 owners usually shop this kit because the compact SUV’s weight, turbo torque, and repeated high-speed stops can overwork the factory iron brake package while coating open AMG-style wheels in dust. This StopFlex kit pairs a 390mm front carbon-ceramic rotor with the Genuine OEM AMG 6-Piston Caliper and a 380mm rear carbon-ceramic rotor with the TTSPORT EP4 4-Piston Caliper with EPB. The result is higher thermal capacity, lower brake dust, reduced rotating mass versus comparable iron hardware, and fitment engineered around the buyer’s exact GLB trim rather than assumed from the X247 platform.
- 390mm front carbon-ceramic rotors require 20 inch or larger wheels on the GLB X247; wheels under 20 inch will not clear the rotor package, and spoke clearance must still be checked.
- The front upgrade uses the exact Genuine OEM AMG 6-Piston Caliper with a 390mm rotor, giving the GLB35-style brake feel and heat margin that GLB200 and GLB250 owners often look for when moving beyond stock iron brakes.
- The rear package uses a TTSPORT EP4 4-Piston Caliper with EPB on a 380mm rotor, preserving electronic parking-brake function while adding rear-axle thermal capacity.
Fitment Hard Lines
| Field | Specification |
|---|---|
| Vehicle | Mercedes-Benz GLB200 / GLB250 / GLB35 (X247) |
| Model years | 2020-2026+ |
| Front setup | Genuine OEM AMG 6-Piston Caliper / 390mm |
| Rear setup | TTSPORT EP4 4-Piston Caliper with EPB / 380mm |
| Page type | Complete CCB kit upgrade |
| Minimum wheel size | 20" (for the 390 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 390 mm front rotor, so the minimum wheel size is 20". Wheels under 20" 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 OEM AMG 6-Piston Caliper, a fixed multi-piston caliper that spreads clamping load across the pad for firmer pedal response and more even pressure on the 390mm carbon-ceramic rotor. Because it is a genuine OEM AMG-derived caliper rather than an anonymous aftermarket casting, it gives this GLB X247 kit a proven Mercedes-AMG performance foundation with the bracket and hat geometry engineered for the confirmed trim.
Rear Caliper (Balance)
The rear axle uses the TTSPORT EP4 4-Piston Caliper with EPB to add real rear braking capacity instead of leaving the back of the GLB on a small factory sliding caliper. Its integrated electronic parking-brake function keeps the OE parking-brake convenience while supporting a 380mm rear carbon-ceramic rotor.
Front & rear, engineered together: The 390mm front and 380mm rear package is engineered as a matched system so the GLB does not receive a high-capacity front axle with an under-supported rear axle. The EP4 rear architecture uses 4 hydraulic service pistons plus a dedicated EPB actuator piston, so rear brake torque, heat capacity, and factory parking-brake function are addressed together.
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 OEM AMG 6-Piston Caliper |
| Front CCB rotors | 390mm |
| Rear calipers | TTSPORT EP4 4-Piston Caliper with EPB |
| 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. |
TTSPORT EP4S rear caliper specification (the EP4 shares the same engineering, slightly more compact):
| Specification | EP4S |
|---|---|
| Axle position | Rear |
| Piston count | 4 hydraulic + 1 EPB actuator |
| Piston type | Two-piece heat-insulated, dust boots + EPB actuator |
| Piston diameter | 28 mm × 4 / 27 mm × 1 |
| Total piston area | 30.4 cm² per caliper |
| Manufacturing process | Two-piece forged aluminum body |
| Net weight | 4.50 kg per caliper (no pads) |
| Surface finish | High-temperature gloss coating |
| Recommended wheel size | 18 in or larger |
FAQ
Will this 390mm kit fit my GLB200, GLB250, or GLB35 X247?
StopFlex builds this kit only after confirming the exact GLB trim, model year, wheel size, wheel offset, hub geometry, and front knuckle/upright package. GLB200, GLB250, and GLB35 share the X247 name, but brackets, rotor-hat offsets, and caliper mounting are specified for the confirmed car, not assumed from the chassis code.
What wheel size is required?
The 390mm front rotor makes 20 inch wheels the minimum for this kit. Wheels under 20 inch will not clear the rotor, and 20 inch wheels still need a spoke-clearance check for the Genuine OEM AMG 6-Piston Caliper.
Will the electronic parking brake still work?
Yes. The rear setup uses the TTSPORT EP4 4-Piston Caliper with EPB, which retains electronic parking-brake operation while replacing the rear brake package with a 380mm carbon-ceramic rotor and a dedicated EPB-capable caliper.
Why choose carbon-ceramic rotors on a GLB instead of iron rotors?
Carbon-ceramic rotors are chosen for lower brake dust, lower rotating mass, and better resistance to heat buildup during repeated hard braking. On a GLB X247 with open 20 inch wheels, the visual payoff is cleaner wheels, while the engineering payoff is more thermal margin than a comparable iron upgrade.
Need Fitment Confirmation?
Send the exact vehicle details, current rotor sizes, and caliper type before ordering.
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