Same 5x112 PCD and same 66.5 mm centre bore: wheels from Audi RS6 C7 bolt on and centre on BMW i8 without rings. You still need to check the offset and tyres, detailed below.
| Audi RS6 C72013–2018 | BMW i82014–2020 | |
|---|---|---|
| PCD | 5x112 | 5x112 |
| Centre bore | 66.5 mm | 66.5 mm |
| Thread | M14x1.50 | M14x1.25 |
| Original wheels | 8Jx20 ET25 | 7Jx20 ET36 |
≈: width estimated from the original tyre size.
Each original wheel from Audi RS6 C7 is compared with the one from BMW i8 of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.
Compared with the original 7Jx20 ET36 on BMW i8: shock absorber side +1.7 mm, wheel arch side +23.7 mm, tyre diameter +0.1 %. Check in detail
An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of BMW i8 (M14x1.25), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.