I have a 2012 BMC road racer and this is what happened to the front seat clamp binder bolt. The lower seat clamp is also cracked. Has anyone else seen this? Also, should there be two conical washers. I could not find anymore hardware on the road.
Broken Seat clamp  Binder Bolt-photo.jpg
Broken Seat clamp  Binder Bolt-photo-1-.jpg