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  1. #1
    mtbr member
    Join Date
    Aug 2013

    Steerer length and buying used fork

    measured my current fork still on the bike as 20.32 cm but this includes the cap. It is my understanding that the streerer tube ends 3 mm under the cap. If so the steerer on the used fork is .02 cm shorter at the length because it is 20 cm. is this difference negligable?

  2. #2
    > /dev/null 2&>1
    Reputation: Procter's Avatar
    Join Date
    Feb 2012

    Re: Steerer length and buying used fork

    If i understand you correctly sounds like the new steerer is possibly ~3 mm shorter than your current (not .02cm shorter as you said). You can remove the cap and check the current setup, since the steerer is held tight by the stem. Your current steerer might be anywhere from 1-5mm below the top of the stem. But, that's not really important, and, doesn't change the question on the new steerer. Its just a good reference . . . most important is where the new steerer will end up.

    Generally if the new steerer ends up ~3mm below the top of the stem it should be totally fine. If your stem is a very short stack stem, plus a steerer 5mm+ under the cap, then i might start to worry. On the other hand if its a tall stem it will still have plenty of leverage on the steerer and be ok with 5mm.

    If you're pushing 5mm+ under the top of the stem, assuming you have no spacers to remove, you could
    A) get a shorter stack stem (which is thus designed to deal with less leverage on the steerer), or
    B- get a shorter stack headset
    Last edited by Procter; 12-09-2013 at 09:59 AM.

  3. #3
    mtbr member
    Join Date
    Aug 2013
    Thanks. There are spacers. Is there any consequence of taking out one of them worst case scenario

  4. #4
    mtbr member
    Join Date
    Jun 2004
    Quote Originally Posted by Minimaltread View Post
    Thanks. There are spacers. Is there any consequence of taking out one of them worst case scenario
    The spacers are just doing that - taking up space, to allow you to position your handlebar higher. Taking one out just means the handlebar will be that much lower. Spacers come in different heights (10mm, 5mm, 2mm), so depending on how big the spacer is that you take out, you might be able to fine-tune your setup by replacing it with a smaller spacer. In any case, the only consequence of removing a spacer (if you have to because of the fork steerer tube length) is that the handlebar will be lower.

  5. #5
    mtbr member
    Join Date
    Jan 2012
    Worst case in your situation you can get a riser bar with more rise to compensate for removing spacers under the stem if the position change annoys you.

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