Just saw this on ebay, I have nothing to do with the seller, looks like it might be a BSA M20 rear wheel ? Please check carefully before buying, in case I'm wrong. Regards Gary
It is an M20 wheel but it looks like the wheel spindle is stuck in it (with one end missing)...Brake drum surface condition is also important on these (if anyone is thinking of buying it) as there is virtually no material that can be removed to clean up the surface....Ian