NIO ET5T build & parts list
| Item | STOPFLEX front spec |
|---|---|
| Vehicle | NIO ET5T |
| Axle scope | Front carbon ceramic upgrade |
| Front caliper | Forged 8-piston monoblock |
| Front rotor | STOPFLEX 380mm carbon ceramic |
| Rotor construction | Long-fiber CCB with crackle ceramic coating |
| Wheel fitment | Clears factory 19-inch wheels |
| Friction (normal temp) | >0.4μ with STOPFLEX pads |
| Friction (900°C) | ≈0.3μ retained |
| Street life (non-track) | 250,000–300,000 km |
Read this before you order
The 380mm rotor was chosen specifically to clear the factory 19-inch wheel. It's the biggest diameter that fits inside those spokes while still adding real heat capacity. If you plan to move up to 20s or 21s later, the package can be revisited — but everything shown here is built around the 19-inch setup.
Why this upgrade works on the ET5T
| STOPFLEX feature | Why it matters on the ET5T | What you notice |
|---|---|---|
| 380mm carbon ceramic rotor | The ET5T is a heavy EV, and the front axle eats most of the braking energy. More rotor mass and swept area means more room to absorb heat before fade sets in. | Pedal stays firm through repeated hard stops instead of going long and soft. |
| Forged 8-piston monoblock caliper | A forged body resists flex under high clamp loads, and more pistons spread pressure across the long pad. On a heavy car that's about control, not piston count. | Cleaner bite and easier modulation when you're braking hard, again and again. |
| Half the weight of steel | Carbon ceramic rotors run about half the weight of a same-size steel rotor, all of it unsprung and rotating at the front wheels. | Lighter steering response and a slightly more settled ride over rough pavement. |
| Heat-stable friction | Friction holds around 0.3μ even at 900°C, and tops 0.4μ at normal temps with STOPFLEX pads — so the brakes behave whether they're cold or cooking. | Consistent feel from the first cold stop down a long grade to the tenth. |
| Crackle ceramic coating, no rust | The rotors don't surface-rust after rain or a wash, and STOPFLEX pads keep dust off the wheel face. | Clean wheels and a finish that still looks sharp through the spokes months later. |
What gets better
- Keep the factory 19-inch wheels — no forced upsize to 20s or 21s
- More thermal headroom for highway runs and back-road driving
- Firmer, more repeatable pedal from the rigid forged caliper
- Lower unsprung mass at the front axle
- Very low brake dust with STOPFLEX pads
- No rotor rust after rain, washing, or sitting parked
What to confirm first
- Your ET5T is running the factory 19-inch wheels this build targets
- You want a front-axle CCB upgrade, which is the scope shown here
- Your wheel offset and spoke design match the test-fit setup
- Your use is street and spirited road driving rather than dedicated track work
If you're not sure your car matches the spec shown here, send us your wheel and trim details and we'll confirm NIO ET5T fitment before you order through our NIO CCB collection.
Build Gallery
NIO ET5T carbon ceramic brake FAQ
Can the NIO ET5T run 8-piston front brakes inside 19-inch wheels?
Yes. This build pairs a compact forged 8-piston front caliper with a 380mm STOPFLEX carbon ceramic rotor, packaged to clear inside the factory 19-inch wheel so you don't have to jump to 20s or 21s.
Why a 380mm rotor instead of going bigger?
On the ET5T at 19 inches, 380mm is the largest diameter that adds real thermal capacity and pad swept area while still clearing the factory wheel spokes. Going larger would force a wheel upsize.
What does the forged 8-piston caliper actually change?
A forged monoblock body flexes less under load, so pedal feel stays consistent as heat builds. The extra pistons spread clamp force more evenly across the pad, which matters on a heavy EV doing repeated hard stops.
Do carbon ceramic rotors make sense on a street-driven ET5T?
Yes. You get lower unsprung weight, strong heat resistance, very low brake dust with STOPFLEX pads, and rotors that don't rust after rain. Street life can reach 250,000 to 300,000 km when the car isn't tracked.
Will cold braking suffer on daily drives?
No. With STOPFLEX pads, normal-temperature friction can exceed 0.4μ, and the first cold stop stays normal even in low ambient conditions around -20°C.
