Z1OwnersClub GB

Any idea what bike has four hole discs with a 64mm hole in the middle?

I bought some through the medium of fleabay and they don't seem to fit a standard wheel, which has an ID of 58mm

The OD is 280mm

Ralph,
This can be useful resource for comparisons,

http://metalgear.com.au/search_by_disc_ ... Find+Discs

Cheers
Phil