Zeekr 001 Big Brake Kit Upgrade / TTSPORT Classic 8657S
Since its debut in 2021, the Zeekr 001 has built a following on its shooting-brake styling, big-battery range, and fast-paced tech updates. But the factory brake system on this car was set up for daily driving, not sustained high-speed or hard-braking use — and this owner decided it was time to close that gap without touching the wheels.
The stock Zeekr 001 comes with single-side dual-piston cast-iron calipers — adequate for commuting, but with real headroom left on the table during hard driving or extended highway speeds. The factory 19-inch dual-spoke wheels, however, were already sized generously enough to accommodate a larger brake package, so a wheel swap wasn't part of this build.
Vehicle & Kit Specs
This install pairs a TTSPORT Classic Series six-piston front caliper with a TTSPORT EP4 electromechanical rear caliper, both running behind the car's stock 19-inch wheels.
| Item | Specification |
|---|---|
| Vehicle | Zeekr 001, 19-inch OEM wheels, no wheel change required |
| Front caliper | TTSPORT 8657S forged six-piston caliper (Classic Series) |
| Front rotor | TTSPORT 405mm curved-vane rotor |
| Rear caliper | TTSPORT EP4 electromechanical caliper (four-piston service brake + integrated electronic parking brake) |
| Rear rotor | TTSPORT 380mm curved-vane rotor |
| Bracket | Custom vehicle-specific caliper brackets, front and rear |
| Pads / lines | TTSPORT high-performance brake pads, TTSPORT stainless steel brake lines |
| Hardware | Brake fluid, mounting bolts, and fitting hardware |
Here's the full official spec sheet for the front TTSPORT 8657S caliper used in this build:
| Brake Caliper | |
|---|---|
| Series | Classic Series |
| Model / Application | 8657S |
| Axle Position | Front |
| Piston Count | 6-piston |
| Piston Type | Two-piece heat-insulated pistons with dust boots |
| Piston Diameter | 30 mm × 2 / 34 mm × 2 / 38 mm × 2 |
| Caliper Dimensions | L 350 mm × W 165 mm × H 92.64 mm |
| Total Piston Area | 55.0 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 4.05 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 18 in or larger |
| Recommended Rotor Size | Ø355–405 mm × 32–34 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 107 |
| Caliper Mounting Type | Radial mount with vehicle-specific caliper brackets |
| Brake Line Fitting Type | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
Because the 8657S mounts on a vehicle-specific bracket sized to keep the caliper and 405mm rotor within the factory wheel's spoke clearance, the whole front assembly fits behind the stock 19-inch wheel with no spacers involved.
Why It Works
- The 8657S is a forged, two-piece six-piston caliper — the rigid body resists flex under hard pedal pressure, which is what firms up the pedal feel compared to the stock single-side dual-piston cast-iron caliper.
- Stepping up to a 405mm front rotor and 380mm rear rotor adds swept area and thermal mass over the stock discs, giving the system more capacity to absorb heat before fade sets in.
- Two-piece heat-insulated pistons and dust boots on both the 8657S and the EP4 keep heat from soaking back into the brake fluid, which helps maintain a consistent pedal during repeated hard stops.
- Vehicle-specific brackets on both axles place the calipers and rotors within the stock 19-inch wheel's clearance, so this remains a bolt-on upgrade without wheel or spacer changes.
- The rear EP4 caliper keeps the four-piston service brake and the electronic parking brake in one unit, so the factory EPB function carries over after the swap.
Installation Gallery
Frequently Asked Questions
Does the TTSPORT big brake kit require larger wheels on the Zeekr 001?
What does the TTSPORT kit include for this Zeekr 001 build?
Does the rear TTSPORT EP4 caliper still work with the electronic parking brake?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.