• I need to get slammed on my Cannondale CaadX. Before I go measure the headset, just to make sure I have understood:

    I think the first number (i.e. 45, 46, 47) is the outer diameter of the top of the head tube.

    I think the second number (i.e. 2, 3) is the depth of the cap, so should be equal to (distance from top of headtube to top of compression ring, less a nominal tolerance to stop it bottoming out)

    Have I got that right?

  • I think the first number (i.e. 45, 46, 47) is the outer diameter of the top of the head tube.
    I think the second number (i.e. 2, 3) is the depth of the cap, so should be equal to (distance from top of headtube to top of compression ring, less a nominal tolerance to stop it bottoming out)
    Have I got that right?

    Yes

    Have you any 47/2 left?

    Yes

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