Originally Posted by
PromptCritical
I went and measured half a dozen of them and they range between 11.74 and 12.04mm. I thought Campy would have better quality control. 😓
It's not a quality control issue if they're all within the design tolerance.
The critical dimension of chainring bolts is the diameter of the nut side (excluding the head). Unless things have changed, the counterbore of Campy chainrings is generously large, leaving plenty of room for the bolt heads, so that dimension isn't critical.