The build: calipers, rotors, wheels
| Item | Front axle | Rear axle |
|---|---|---|
| Vehicle | Xiaomi SU7 Max — 673 hp electric sedan, about 2,200 kg | |
| Caliper | Akebono 10-piston | Akebono 4-piston |
| Rotor | 420 mm STOPFLEX carbon ceramic | 410 mm STOPFLEX carbon ceramic |
| Pads | STOPFLEX low-dust compound | STOPFLEX low-dust compound |
| Mounting | OE-style mount | Dedicated bracket, factory EPB retained |
| Wheel needed | 21-inch barrel required for front clearance | |
Read this before you order
This 420 mm front package is not a drop-in for every SU7 Max. The Akebono 10-piston caliper and rotor need a 21-inch wheel barrel to clear — the standard 19-inch and 20-inch wheels won't fit over it. Confirm your wheel first.
Why it works on the SU7 Max
| STOPFLEX feature | Why it matters on the SU7 Max | What you notice |
|---|---|---|
| 420 mm front carbon ceramic rotor | Hauling a 2,200 kg EV down from speed dumps serious heat into the front brakes, over and over. | Pedal stays in the same window cold, warm, or hot, instead of going long after a few hard stops. |
| Akebono 10-piston front caliper | More pistons spread clamp load across a bigger pad, so heat isn't concentrated in one spot. | Firmer, more predictable bite when you're pushing on a back road or a long downhill. |
| Half the rotor weight of steel | Carbon ceramic rotors cut unsprung mass at each corner on an already heavy car. | Steering feels a touch quicker to respond and the suspension settles faster over bumps. |
| Low-dust pad pairing | Big 21-inch wheel faces show every bit of brake dust. | Wheels stay clean between washes instead of greying over after a couple of drives. |
| Rust-free ceramic rotor face | EVs sit parked a lot, and iron rotors surface-rust fast after rain or a wash. | The rotor face stays clean behind the spokes year round. |
| Heat tolerance to ~0.3μ at 900°C | Repeated highway-speed pulls and long grades are exactly where iron fades. | Brake feel holds up on the tenth hard stop, not just the first. |
What gets better
- Steadier pedal effort and travel across cold, warm, and hot conditions
- More heat headroom for long downhills and repeated highway-speed stops
- Lower unsprung mass at all four corners for sharper response
- Very low brake dust, so the 21-inch wheels stay clean
- Rotor face that doesn't rust after rain, plus normal cold first-stop bite around -20°C
- Front-to-rear balance kept with a 410 mm rear rotor and 4-piston caliper
What to confirm first
- Wheel size: the front package needs a 21-inch barrel, not 19 or 20-inch
- That you want a full front and rear setup, not a partial cosmetic change
- Factory EPB retention is handled by the rear bracket — verify your car matches
- Final feel still depends on pad choice, fluid condition, and tire grip
If you're not sure your car matches the spec shown here, send us your details and we'll confirm Xiaomi SU7 Max fitment before you order through our Xiaomi CCB collection.
Build gallery
FAQ
Why run a 10-piston front caliper on a Xiaomi SU7 Max?
The SU7 Max makes 673 hp and weighs roughly 2,200 kg, so repeated stops from speed dump a lot of heat into the brakes. This build uses the Akebono 10-piston front caliper to add pad area and spread heat more evenly, which keeps pedal response steadier when you're driving hard.
Will the 420 mm front rotor fit the standard Xiaomi SU7 wheels?
No. In this configuration the 420 mm front rotor and Akebono 10-piston caliper need a 21-inch wheel barrel for clearance. They will not clear the standard 19-inch or 20-inch wheels, so confirm your wheel before ordering.
Does the rear electronic parking brake still work after the upgrade?
Yes. The rear axle uses a dedicated bracket to mount the Akebono 4-piston caliper while keeping the factory electronic parking brake motor, so hill-hold and daily use are unchanged.
What do you actually notice day to day with STOPFLEX carbon ceramic rotors?
Beyond more heat headroom, STOPFLEX carbon ceramic rotors weigh about half what same-size steel rotors do, don't rust after rain, and throw very little dust when paired with STOPFLEX pads. On a heavy EV that means steadier pedal feel, cleaner wheels, and no surface rust on the rotor face.
