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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
    ?

  • If your bolts are pre-2004 (and don't fit), then your cranks are 2004/5/6 square taper (not UT) and you want the bolts with the part numbers in the second diagram above.

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