I do no think they are m12. I would have to dig out what I ordered to find the size but I had a special order from a local supplier when I needed longer ones after upgrading to wolf wheels. Mine is the same as @Blackburn has linked and I use the hasp with a padlock rather than locking the bolts. Some bonnets do have holes cut for the bolts to come through in which case and R clip through the end of the bolt will be an additional security measure on top of a padlock through the post but that is only of benefit if the bonnet also has a hasp and staple or some form of lock, otherwise you can just open the bonnet to remove the r clip.
Me too, I managed to take some to the council recycling centre but they've started charging £20 per wheel now so I'm hoping the rest will rust away behind my shed.If anyone would like to thieve a series wheel and tyre, I’ve got some in my back garden I can’t give away. Please help yourself.
It would please Mrs Sticle no end.
