Not sure if this image is any use
http://s2-audi.co.uk/images/DSCN2590.JPG
If you zoom in you can confirm the tyre size is 125/90 R15. Feel free to save a copy - it will be online for a few days before I take it down again
Other side of the wheel was a reddish / brown shade. Pretty sure it was a 15x4 rim size.