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  1. #1
    mtbr member
    Reputation: ewarnerusa's Avatar
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    Thomson post & KCNC quick release clamp, post keeps slipping

    I have had no issues previously with my Thomson post and slipping (Al frame bike). I just replaced a dying quick release with a KCNC quick release. Now I can't keep the post from slipping down. It seems to me like the qr is cranked down hard, I'm nervous about tightening it up any further. Any input?

  2. #2
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    Seems pretty obvious the KCNC one isn't as strong. You can try using talc (climber's chalk), or some form of friction paste. I have had really good lock with colouring the covered part of the seatpost with a black sharpie; no idea why it works, it just does.

  3. #3
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    Reputation: Rev Bubba's Avatar
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    Blue Locktite

    That worked for me with a Thomson post and steel frame. Just use a little so you can break the post loose if need be.

    Do not use this method if you are constantly adjusting your post.

  4. #4
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    Quote Originally Posted by Rev Bubba
    That worked for me with a Thomson post and steel frame. Just use a little so you can break the post loose if need be.

    Do not use this method if you are constantly adjusting your post.
    I like to occasionally drop the seat for downhills. Plus I need to remove the seat for the way I like to transport it in my truck w/ topper. Thanks for the input.

  5. #5
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    Reputation: GEARHEAD_ENG's Avatar
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    Try a better quality clamp, could be the one you have is "out of round" so you aren't getting even pressure around the seat post tube.

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