Zeekr Mix Big Brake Kit Upgrade / TTSPORT Evolution EB6 & EP4S
The Zeekr Mix is an electric MPV built around clever, reconfigurable interior space — but it's also a nearly 2.7-ton vehicle. Load it up with family and gear, run it hard down a mountain grade or through repeated stop-and-go traffic, and the factory brakes start to give up the fight: a soft pedal, fade under repeated hard stops, and less margin than a heavy EV really needs. This owner addressed it with a TTSPORT front six-piston / rear electromechanical big brake kit.
At nearly 2.7 tons, an electric MPV puts far more heat into its brakes than a comparable gas-powered vehicle its size — the extra battery mass has to be arrested by the same rotor and pad surface. Highway cruising with a full load, then a downhill run or a panic stop in traffic, is exactly the scenario that cooks factory brakes. The owner's goal here wasn't outright track performance, it was margin: a firmer pedal and more thermal capacity for everyday family driving.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Zeekr Mix electric MPV, ~2.7-ton curb weight, 20-inch wheels |
| Front caliper | TTSPORT EB6 forged six-piston caliper |
| Front rotor | TTSPORT 390mm high-carbon rotor |
| Rear caliper | TTSPORT EP4S electromechanical four-piston caliper with integrated EPB actuator |
| Rear rotor | TTSPORT 380mm high-carbon rotor |
| Bracket | Custom vehicle-specific caliper brackets, front and rear |
| Pads / lines | TTSPORT high-performance brake pads, stainless steel brake lines |
| Hardware | Brake fluid, mounting bolts, and fitting hardware |
Below are the official TTSPORT spec sheets for the two calipers used in this build — the front EB6 and the rear EP4S.
| Brake Caliper | |
|---|---|
| Series | Evolution Series |
| Model / Application | EB6 |
| 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 335 mm × W 160 mm × H 102 mm |
| Total Piston Area | 55.0 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 4.6 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 19 in or larger |
| Recommended Rotor Size | Ø380–410 mm × 36 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 103 |
| 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 |
| Brake Caliper | |
|---|---|
| Series | Evolution Series |
| Model / Application | EP4S |
| Axle Position | Rear |
| Piston Count | 4 hydraulic pistons + 1 for EPB actuator |
| Piston Type | 2-piece heat-insulated pistons with dust boots + EPB actuator |
| Piston Diameter | 28 mm × 4 / 27 mm × 1 |
| Caliper Dimensions | L 278 mm × W 202 mm × H 93 mm |
| Total Piston Area | 30.4 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 4.50 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 18 in or larger |
| Recommended Rotor Size | Ø345–380 mm × 28 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 97 |
| 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 |
The kit ships as a matched set — calipers, rotors, custom brackets, pads, and stainless lines — engineered to bolt in without spacers, adapters, or trial fitment. That matters on a vehicle like the Mix where the factory suspension geometry and wheel offset are known quantities the bracket design can be built around.
Why It Works
- The EB6 is a two-piece forged six-piston caliper with an asymmetric, structurally hollowed body — through-body reinforcement ribs add roughly 20-30% stiffness versus a conventional design, so the caliper flexes less under hard braking and the pedal stays firm instead of going long and soft.
- Two-piece heat-insulated pistons and high-temperature seals slow heat transfer into the brake fluid, which is the usual root cause of fade on a heavy vehicle after repeated hard stops.
- Larger 390mm front and 380mm rear rotors add rotational mass and surface area, giving the system more thermal capacity to absorb before temperatures climb into fade territory.
- The rear EP4S keeps the factory electronic parking brake fully functional — four hydraulic pistons handle service braking while a fifth, dedicated single-piston actuator drives the EPB, so upgrading doesn't sacrifice a factory convenience feature.
- Custom vehicle-specific brackets place both calipers to clear the Mix's 20-inch factory wheels, matching the 19-inch-plus and 18-inch-plus wheel recommendations for the EB6 and EP4S respectively.
Installation Gallery
FAQ
What wheel size does this TTSPORT kit require?
Does the rear caliper work with the Zeekr Mix's electronic parking brake?
What rotor sizes were installed front and rear?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.