Yes, the hub is identical
Same 4x100 PCD and same 56.6 mm centre bore: wheels from Opel Adam Rocks bolt on and centre on Holden Barina 4 trou 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 Opel Adam Rocks is compared with the one from Holden Barina 4 trou 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.
- ✓
6Jx15 ET39 · 185/60R15 — Fits like the original
Compared with the original ≈6Jx15 ET39 on Holden Barina 4 trou: shock absorber side 0 mm, wheel arch side 0 mm, tyre diameter −5 % : fit it with the original tyre size of Holden Barina 4 trou (195/65R15), not that of Opel Adam Rocks.
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 Holden Barina 4 trou (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 Holden Barina 4 trou on Opel Adam Rocks?