Yes, the hub is identical
Same 4x108 PCD and same 65.1 mm centre bore: wheels from Peugeot 206 Plus bolt on and centre on Opel Rocks-E 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 Peugeot 206 Plus is compared with the one from Opel Rocks-E 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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5.5Jx14 ET24 · 175/65R14 — Check on the car
Compared with the original 5.5Jx14 ET34 on Opel Rocks-E: shock absorber side −10 mm, wheel arch side +10 mm, tyre diameter +4.7 % : fit it with the original tyre size of Opel Rocks-E (155/65R14), not that of Peugeot 206 Plus.
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 Opel Rocks-E (M12x1.25), 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 Opel Rocks-E on Peugeot 206 Plus?