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  1. #1
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    Will 25.4 to 31.8 stem shim safely clamp 26?

    Just wondering?

  2. #2
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    I ran 25.4 deity bars with a shim in a thompson 31.8 stem for a year before I got 31.8 bars. zero issues.

  3. #3
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    Yea but will the 25.4 shim safely clamp 26mm bars? There are 25.4 bars and 26 bars. I'm talking about road drops.

  4. #4
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    No clue, the shim was extremely tight on my set up, you might risk damaging your bars?

  5. #5
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    the answer is no. Mixing and matching 25.4 and 26.0 bars and stems always leads to a problematic install. Since you want to put big bars in a small stem your going slightly crush the bars. 26.0 stems aren't that expensive, just get what you need to make the setup work properly.

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