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  • Can anyone tell me how this Specialized steerer expander plug is supposed to work?

    The flange at the top is part of the expanding sheath, and when I expand the plug in the steerer, it then sticks out beyond the edges of the top of the steerer tube, to the extent that a spacer no longer fits over it.

    The instructions show it being installed without any spacer above the stem. It seems like even if I was doing that, the flange would dig into the walls of the stem clamp and prevent the stem being pressed down properly.

    Does anyone have a clue?


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    • IMG_20181127_101235995.jpg
  • Does anyone have a clue?

    Clearly Specialized don't. I'd suggest getting an alternative one which allows you to fit it properly.

  • The ones I've messed with don't interfere with the spacers/stem, they are a dick to remove though without a little trick and something reasonable large, flat and with a hole in. Are the walls of your steerer particularly thin or designed for a specific bung?

  • Does it require a certain specialized Stem?

  • That's a pretty stupid design; Most expanding plugs I've seen have the flange as part of the upper wedge, not the sleeve.

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