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  1. #1
    mtbr member
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    Seatpost clamp question?

    I would like to have a quick release clamp on my seatpost instead of the bolted one that came on the bike.

    The seatpost is listed at 31.6 mm, how do I know what size quick release clamp to purchase or are they all standard and is one brand better than another?

  2. #2
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    31.6 is the seatpost diameter, which is the inside diameter of the seat tube. The QR clamp would need to match the outside diameter, which is probably 34.9mm (or 1 3/8") but double check; take the post out and measure the outside of the seat tube.

    Hope and Salsa are pretty well-regarded, there are a lot of other brands out there that are good as well.

  3. #3
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    Very technical stuff? You would think the clamp would be sized to the "stated" seatpost size?

    Crank brothers have a nice split lever clamp, but $45??

  4. #4
    Front Range, Colorado
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    Quote Originally Posted by rickcin View Post
    Very technical stuff? You would think the clamp would be sized to the "stated" seatpost size?

    Crank brothers have a nice split lever clamp, but $45??

    It is, just match up the numbers. And as stated
    above Salsa or Hope are good as well as many
    others. But those two brands make a top notch
    product. Any question while purchasing can be asked at the bike shop. If buying on line just match the numbers up.
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  5. #5
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    the clamp doesn't go on the seatpost, it goes on the frame, and it matches up with the corresponding dimension on the frame. If your frame uses a clamp-on FD, most of the time the seat clamp is the same size.

    $45 is, IMO a little much for a seat clamp, and it's Crank Bros, which means sure it looks cool, but it will probably break the 3rd time you use it, like everything else they make.

  6. #6
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    I was looking to buy a QR clamp in order to raise the saddle when putting the bike on a work stand.

    Thinking now, I might be better off with the Bontrager Torque tool, which is a 4MM pre set allen tool and I could just use that every time when using the work stand.

    What do you think? Cheaper than a new QR clamp.

  7. #7
    Quiet Professional
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    I have a black 34.9 qr clamp you can have if interested.

  8. #8
    Front Range, Colorado
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    Go for the quick release, as you get better your going to want to lower the seat for steep technical terrain.
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  9. #9
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    Quote Originally Posted by DIRTJUNKIE View Post
    Go for the quick release, as you get better your going to want to lower the seat for steep technical terrain.
    Yeah, I think you are correct, the QR clamp will be more useful especially when out riding the trails.

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