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legend.
see "older square taper" could mean two things (according to forums online): the pre-2011 UT carbon square taper (my crankset) and pre-2004 square taper. i have chainring bolts for the latter and the circumference is too large.
the kcnc bolts are the right circumference, so when they arrived i thought "magic!".
i'm now convinced they're wrong: they're bottoming out against each other. once fully tightened, tightening one side whilst NOT holding the other causes them to rotate. balls.so "older square taper" means one of three standards:
wide pre-2004
narrow pre-2011 UT
narrow pre-2011 sq. taper
?
noiser
Scilly.Suffolk
From the KCNC blurb: "Will not fit older square taper Campag cranks", ie they're for Ultra Torque.
The Campag bolts you've linked to are also UT.
Your cranks are 2002/3 or 2004-2006 square taper (the catalogue part numbers change between the two periods, but I don't know what the difference is, if any).