Yes, the hub is identical
Same 5x112 PCD and same 66.6 mm centre bore: wheels from BMW X1 U11 bolt on and centre on BMW M8 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 BMW X1 U11 is compared with the one from BMW M8 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.
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8Jx19 ET46 · 245/45R19 — Check on the car
Compared with the original ≈8.5Jx19 ET36 on BMW M8: shock absorber side +3.7 mm, wheel arch side −16.4 mm, tyre diameter +0.1 %.
Comparison for guidance only (estimated width). Check in detail
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7Jx17 ET41 · 205/65R17
BMW M8 has no 17-inch original wheel in our data: check the approved fitments and caliper clearance.
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 BMW M8 (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.
And the other way round: wheels from BMW M8 on BMW X1 U11?