Using a normal tyre on an emergency wheel

One of my friends discovered a car-sharing vehicle, all four wheels of which were replaced by the emergency wheels, but it seemed to have normal tyres on it. Here’s the picture of one of its wheels (the car is Russian-spec VW Polo).

As stated on the rim it’s not safe to use it permanently, but all info that I’ve found was regarding the tyre. And this car has a set of normal sized (185/16) ones.

So my question is (out of curiosity, not that I had an intention to drive it) – what exactly will happen to this car? Will rims fail?