I have never seen those before, except maybe on an original Rover promotion goody, where you can pull different wheels into view on a cardboard Rover 75 picture, with a small slide behind it.
But I can't say they catch my fancy, and they must be extra difficult to keep clean, so I understand why Rimmers still have new stock!
But that really is non of my business anyhow. The Car looks very good though, and is the same colour as my Tourer.
The Rover still looks good after so many years. That they did get right!