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  1. #1
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    Need help/suggestion - Pedal/Cassette shakes during wheel spinning

    Hi all,

    First of all i apologize if i am opening new thread in a wrong place but probably it is relative to this.

    So, the problem is that 1 day ago i bought brand new one bicycle from official seller of Specialized "Specialized Rockhopper Sport 29 2017", after 2 hour testing i went at home, rotated it to check pedal/wheel spinning and i noticed that there is a small shaking in a pedals and cassette during the wheel spinning.

    Here is the videos from youtube and from vimeo (in case one of them will not loaded)





    When i noticed this, i immediately went back to seller and they told me that it is totally normal.

    I really do not feel this during the riding so it does not make some problem for me, I am just little bit wondering and just want to double check it - should brand new bike have this kind of problem?

    Might it because it is a new and need some time or maybe there is too much pellgunoil in a hub?

    Thanks a lot!
    Attached Thumbnails Attached Thumbnails Need help/suggestion - Pedal/Cassette shakes during wheel spinning-15965185_1504087186300590_2041886248229558554_n.jpg  


  2. #2
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    Totally normal. It's due to a slight eccentricity in the freehub, which is very common on this level of wheel. I don't think I've seen one without it.
    Do the math.

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