So, I now have a new set of wheels for the Z3.
These will be my new winter tyre set, as I got fed up with the tiny 16" Styling 32.
They are BMW Styling 19 wheels 17 x 8J ET20. They were made by BBS, 2-piece with forged rim. They are light and look very nice

Currently on 235/45/17 which look a bit fat, but I will fit 225/45/17 next winter.