Anydody ever had this happen, or have any ideas how it happened? I recently came back from a weeklong ride. The next day, before going for a ride I noticed this. The two studs/bolts are snapped off where they come out of the cush drive. Someone suggested this happens when the nuts are too loose. "Vibration snapped off the studs". I don't see that there could be any play in the sprocket with the three other studs still there. I would think that over tightening would strip the nut or strip the stud out of the aluminum cush drive before the stud itself would snap. This sprocket had been installed for about 15,000 miles. Anyways this led to a good ending. I had been saving for new wheels for a long time. I used this as an excuse to break down and buy a new set of Carrozzeria wheels. They are a great mod and I am loving them.
Enjoy the wheels 
