1990's Stumpjumper 26mm Threadless Stem Replacement- Mtbr.com
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  1. #1
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    1990's Stumpjumper 26mm Threadless Stem Replacement

    Hi everyone. I'm replacing a 1990's Stumpjumper threadless stem, with a shorter stem from Velo Orange. I measured the old handlebar diameter and old stem as 1 inch, however, I accidentally ordered a 26mm not a 25.4mm stem. After realizing this, I ordered shims to go from 25.4 to 26mm. I installed the stem without the shims and it seems to fit the bar tightly. Should I still use the shims?

    This is the first time I've swapped out a stem, so I'm seeking some advise. I kept the handlebars the same, which are marked Specialized and look to be original to the bike. The stem that I am replacing is a longer vintage looker Tioga. Thanks in advance!

    1990's Stumpjumper 26mm Threadless Stem Replacement-cymera_20190511_070346.jpg1990's Stumpjumper 26mm Threadless Stem Replacement-cymera_20190511_070405.jpg

  2. #2
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    You'll be fine. I have used road stems, which are 26.0, on several occasions in the past and on a current bike for years.
    EXODUX Jeff

  3. #3
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    Thanks for sharing your experience!

  4. #4
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    Another question. Is it possible the old stem covered more at the base of the headset? I know I ordered the right diameter stem to fit the steerer tube, but there appears to be more of a grease ring visible at the top of the headset. See photo, with pencil pointing to ring in question. If so, is there a part that will cover this area better?1990's Stumpjumper 26mm Threadless Stem Replacement-cymera_20190511_124139.jpg

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