The Build: BMW i7 G70 Parts List
| Component | Specification |
|---|---|
| Vehicle | BMW i7 (G70) |
| Front setup | Brembo BM6 six-piston caliper with 405 mm STOPFLEX carbon ceramic rotor |
| Rear setup | Brembo BM4 four-piston caliper with integrated EPB, paired with 380 mm STOPFLEX carbon ceramic rotor |
| Pads | STOPFLEX ceramic street compound |
| Wheel context | Packaged to clear the factory 21-inch wheels on this car |
| Weight reduction | Around 30 kg total across both axles |
| Axle scope | Full front and rear carbon ceramic conversion |
Read this before you order
This is a full big brake kit, not a disc-only swap. It replaces the factory calipers and rotors at both axles. The rear runs a Brembo BM4 caliper with integrated EPB, so your factory electronic parking brake keeps working — that integrated caliper is the part that makes it possible, so confirm your car matches before ordering.
What the Upgrade Actually Changes
| STOPFLEX feature | Why it matters on the i7 | What you notice |
|---|---|---|
| Carbon ceramic rotors, about half the weight of same-size steel | The i7 is a heavy full-size EV, so pulling mass off the corners helps the suspension control wheel motion | Sharper steering response and a settled, composed ride over rough pavement |
| Rust-free rotor faces | EV regen means the friction brakes sit unused for long stretches, and iron discs rust when they do | No orange ring on the disc and no gritty noise on the first few stops after rain |
| High heat tolerance — roughly 0.3μ surface friction at 900°C in testing | Slowing a car this heavy from speed dumps real heat into the brakes | A firm, predictable pedal during repeated hard stops instead of fade |
| STOPFLEX ceramic street pads, friction above 0.4μ at normal temps | A flagship EV has to stay quiet and smooth, not feel like a track car | Confident bite and short street stopping distances with low dust |
| Long-fiber CCB construction | The i7 is kept for years, so the rotors need to survive thermal cycling without surface breakdown | Consistent pedal feel across a long ownership cycle |
What gets better
- Roughly 30 kg less unsprung and rotating mass for cleaner steering and ride
- Rotors that stay rust-free, even after sitting through rain
- Far more heat headroom for repeated hard stops on a heavy car
- Much less brake dust on the wheels with STOPFLEX pads
- Normal first-stop bite even around -20°C in cold weather
- Street life in the 250,000 to 300,000 km range when off-track
What to confirm first
- That your i7 is the G70 platform this kit is built around
- That you run the factory 21-inch wheels referenced here, or send your wheel specs
- That you want the full front and rear conversion, not a single axle
- That keeping the factory electronic parking brake is a requirement (it is retained here)
If you're not sure your car matches the spec shown here, send us your details and we'll confirm BMW i7 G70 fitment before you order through our BMW CCB collection.
Build Gallery
BMW i7 Brake FAQ
Why bother upgrading the friction brakes on an EV that already has strong regen?
Regen handles most light, everyday slowing, but the friction brakes still do all the work in panic stops, repeated hard stops, and any time regen is limited. Because iron rotors sit unused so often on an EV, they tend to surface-rust, which causes that rough first-stop noise and an orange ring on the disc. Carbon ceramic rotors stay rust-free and ready for the stops that actually matter on a car as heavy as the i7.
Does this BMW i7 brake upgrade keep the factory electronic parking brake?
Yes. The rear uses a Brembo BM4 four-piston caliper with integrated EPB, so the i7 keeps its factory electronic parking brake working exactly as before.
Will carbon ceramic brakes make the i7 louder or harsher?
That is not the point of this build. On a flagship EV, refinement counts as much as stopping power, so the rotors are paired with STOPFLEX street pads tuned for smooth, quiet operation. Because the rotors do not rust, you also avoid the gritty first-stop noise that lightly used iron discs tend to make.
Can lighter brakes actually change how the i7 drives?
They can. STOPFLEX carbon ceramic rotors weigh roughly half what same-size steel rotors do, and cutting unsprung and rotating mass tends to sharpen steering response and help the suspension settle. The source build notes about 30 kg of total weight reduction, which is meaningful on a car this large.
How long do STOPFLEX carbon ceramic rotors last in street use?
In normal street driving with no track use, STOPFLEX carbon ceramic rotors can last roughly 250,000 to 300,000 km. On an i7, where regen handles a big share of daily braking, rotor wear can be even lower than that.
