Yes, the hub is identical
Same 5x114.3 PCD and same 67.1 mm centre bore: wheels from Hyundai IONIQ 5 bolt on and centre on Kia EV9 without rings. You still need to check the offset and tyres, detailed below.
≈: width estimated from the original tyre size.
Wheel by wheel: offset and tyres
Each original wheel from Hyundai IONIQ 5 is compared with the one from Kia EV9 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.
- ✓
≈7.5Jx19 ET50 · 235/55R19 — Fits like the original
Compared with the original 8Jx19 ET53 on Kia EV9: shock absorber side −9.3 mm, wheel arch side −3.3 mm, tyre diameter −6 % : fit it with the original tyre size of Kia EV9 (255/60R19), not that of Hyundai IONIQ 5.
Comparison for guidance only (estimated width). Check in detail
Before fitting the wheels
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 Kia EV9 (Ecrous - 12x1.50), 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.
And the other way round: wheels from Kia EV9 on Hyundai IONIQ 5?