I'll go measure
brb
The single bolts that I have are 7mm tall including the lips and the lips are 1mm tall exactly.
You could basically measure the thickness of the crank spider and the thickness of the bolt holes on your chainring then get bolts that are shorter than the combined thickness.
I think the 6mm should suffice but there is no harm in getting the shortest - 5.7mm - ones as they are "track" specific.
Last edited by Squirrelli; 04-02-11 at 11:18 PM.