The build: what's on this SU7 Ultra
| Vehicle | Xiaomi SU7 Ultra |
|---|---|
| Front setup | Factory 6-piston caliper with 430mm STOPFLEX long-fiber carbon ceramic rotor |
| Rear setup | Factory caliper with 410mm STOPFLEX long-fiber carbon ceramic rotor |
| Rotor construction | 3D continuous long-fiber carbon ceramic matrix |
| Pads | STOPFLEX endurance pad configuration matched to the ceramic rotor surface |
| Upgrade scope | Direct-fit front and rear rotor replacement, factory caliper layout retained |
Confirm before you order
This build is specific to the Xiaomi SU7 Ultra, not the wider SU7 range. Because the Ultra runs its own brake hardware and software, confirm your car matches this exact front and rear setup before you buy.
What the upgrade actually changes
| STOPFLEX feature | Why it matters on the SU7 Ultra | What you notice |
|---|---|---|
| Long-fiber carbon ceramic matrix | The Ultra is a heavy, high-output EV that can dump a lot of heat into the rotors fast. Long fiber is chosen for stronger structural integrity than chopped-fiber ceramic under repeated thermal load. | A more repeatable pedal and braking point when you hit the brakes hard over and over, instead of fade creeping in. |
| High-heat friction stability | Back-to-back hard stops push rotor temps way up, where lesser materials lose bite. | At 900°C, tested rotor surface friction still holds around 0.3μ; with STOPFLEX pads, normal-temperature friction can top 0.4μ. |
| Roughly half the weight of steel | These rotors carry about half the mass of an equivalent steel rotor, cutting unsprung and rotating weight at each corner. | Sharper suspension reaction over bumps and a lighter, more honest steering feel, without touching the factory calipers. |
| Low dust, no rust, ceramic coating | A daily-driven Ultra still sits in driveways and rain between hard drives. | Very low brake dust with STOPFLEX pads, rotors that don't rust after rain, and a crackle-texture ceramic finish that stays clean behind the wheel. |
| Refurbishable long-fiber rotors | Hard users burn through consumables; throwing away whole rotors gets expensive. | The rotors can be refurbished, giving heavy drivers a longer-term path instead of full replacement. |
What gets better
- More repeatable braking through back-to-back hard stops
- Stronger heat tolerance front and rear under sustained load
- Lower unsprung and rotating mass at every corner
- Very low brake dust and a cleaner wheel face
- Rotors that don't rust after rain and can be refurbished
What to confirm first
- Your car is the SU7 Ultra, not another SU7 variant
- Front and rear factory calipers match this 430mm/410mm setup
- Pad choice fits how you actually drive: street, grade, or track
- You want a rotor upgrade, not a full big brake kit
If you're not sure your car matches the spec shown here, send us your details and we'll confirm Xiaomi SU7 Ultra fitment before you order through our Xiaomi CCB collection.
Build gallery
SU7 Ultra brake questions
The SU7 Ultra already has ceramic brakes. Why switch to STOPFLEX?
This isn't about fixing a weak factory system. It's for owners who load the brakes hard, again and again, and want more margin. STOPFLEX uses long-fiber carbon ceramic construction, chosen for stronger structural integrity and better resistance to heat-related wear than chopped-fiber rotor designs.
Will this shorten my stopping distance?
In one hard stop from speed, tire grip sets the limit, not the rotor. The real gain is consistency: a more heat-stable rotor holds a more repeatable pedal and braking point through repeated hard use, like back-to-back stops down a grade or on track.
Does it keep the factory calipers and electronics?
Yes. This is a direct-fit rotor replacement that keeps the factory 6-piston front calipers, the rear calipers, and original geometry, so it works with the car's existing brake hardware and electronics. Confirm fitment for your exact car before ordering.
Can STOPFLEX carbon ceramic rotors be refurbished?
Yes. STOPFLEX long-fiber carbon ceramic rotors can be refurbished, which matters if you use the car aggressively and want a longer-term rotor strategy instead of full replacement.
Is this a street upgrade or a track upgrade?
Both, but the strongest case is repeated hard use. You still get low dust, no rust after rain, and a clean wheel face on the street. The payoff grows the more often you heat the brakes hard.
