Yes, the hub is identical
Same 5x110 PCD and same 65.1 mm centre bore: wheels from Opel Speedster bolt on and centre on Dodge Dart 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 Speedster is compared with the one from Dodge Dart 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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≈5.5Jx17 ET26 · 175/55R17 — Fits like the original
Compared with the original ≈7Jx17 ET41 on Dodge Dart: shock absorber side −34.1 mm, wheel arch side −4.1 mm, tyre diameter −1.6 %.
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 Dodge Dart (-), 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 Dodge Dart on Opel Speedster?