Yes, the hub is identical
Same 5x108 PCD and same 63.4 mm centre bore: wheels from Volvo EX40 axe arrière bolt on and centre on Smart #5 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 Volvo EX40 axe arrière is compared with the one from Smart #5 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.
- ✕
8.5Jx19 ET56 · 255/45R19 — Risk of rubbing
Compared with the original 7.5Jx19 ET43 on Smart #5: shock absorber side +25.7 mm, wheel arch side 0 mm, tyre diameter −2.1 % : fit it with the original tyre size of Smart #5 (245/50R19), not that of Volvo EX40 axe arrière.
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 Smart #5 (M14x1.5), 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 Smart #5 on Volvo EX40 axe arrière?