As dropper seatposts have evolved, one issue that’s been consistent is binding when a seatpost collar is over tightened. Many modern posts have tried to address this with more robust outer cylinders or tricky internals, but the fact remains, if you over tighten your collar, things may not work as well as they should. Eightpins, in an apparent collaboration with Syntace, will be introducing a completely different take on it at Eurobike. Judging by the fuzzed out photo of it, it could involve frame integration, or possible an expanding system that locks the post into place by wedging against the inside of the seat tube. We’ll be there to cover it, but take some guesses in the comments…


    • Marin on

      It actually says in the title. It’s Liteville 301.
      In any case, are collars really such an isuse? With some carbon paste you barely need to tighten the post far below recommeded 5-6Nm max torque.

      • Ol'shel' on

        It’s an issue if they think they can convince you to spend more money to get the latest and greatest feature. Yes, you’re current bike is no good because it doesn’t have the right axle spacing or seatpost clamp style.

  1. Groghunter on

    hmmm, maybe this is why the new Enduro has such a big seat tube? an expanding collet would require more space in the seattube…

  2. norcom on

    Lets hope they make it a press fit seat post. I don’t know about the rest of you but I’ve been asking for more different standards.

  3. Von Kruiser on

    It’s a dual clamp. One clamp grabs the frame, the other grabs the post and evenly distributes the clamp force to a larger area… or Elmer’s glue.

  4. Captain on

    Didn’t they already make a fix for this?
    A bolt-on collar and a torque key?
    I should start a Kickstarter with those bundled, add an instructions booklet, and call it The Idiots Guide to Seatposts

  5. Tdr on

    Maby locring srewed on post witch sits in socket on top of seat tube, with side flatened interface on lower part of post. Personalny I would be afraid of screw wear from dirt and seatpost work (if screw was no long enaugh).

  6. Echo on

    Are we finally going to see oversized seat tubes with integrated droppers? Makes sense to give more space to (in theory) improve reliability.

  7. Von Kruiser on

    Wait, the dropper actually screws into the top of the ST of the frame. No need for a clamp since it is integrated into the frame. Ha, that’s it…. or Elmer’s glue.

  8. Fog on

    Literally building the outer part of the post into the frame would bring a lot of benefits; bigger top part of post so could be lighter, seals would keep water out of the entire frame, and everything else could be bigger making it easier to make it stronger and more durable…. however would need more stroke and some end stops to cover all rider heights/tastes and if something went wrong you’d be without the bike while it was being fixed rather than just sticking another post in.

    • Groghunter on

      I really hope you’re wrong. If frame manufacturers can’t manage to make a press fit BB shell to spec, I shudder to think what problems you’d have with them making the sealed tube for outer portion of a dropper.

  9. Flatbiller on

    Will the eight people worldwide who experience this issue please raise your hand. (In related news, these eight people do NOT own a torque wrench.)

  10. Hans Kunenborg on

    its a tube between the seatpost and the frametube that clamps the seatpost when its pushed down. To releave it just pull the post up. Hold the betweentube a bit up and adjust the height.

  11. TimB on

    Probably an external tapered collar with expanding shims that’s threaded to the outer shaft of the dropper. Twist a collar at the top of the fixed part of the post and it engages the expanding shims to grip the inside of the seat tube.


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