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  1. #1
    ballbuster
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    Lefty Adapter... anything lighter?

    I have a Project321 set of adapter clamps. Gawdang things are 504 grams!!

    I have a Lefty Max 140 Aluminum, reduced travel 29er use. The original Cannondale clamps and 1.5" steerer tube are 344 grams.

    Seems to me there has to be a way to use the original clamps with a lighter steerer tube.

    I remember Terminaut's original lefty adapter from back in the day was just a custom milled steerer tube that was pressed into the original clamps, and secured with a threaded bolt.

    Is there a lighter steerer tube I can use with the original clamps in the same manner, and have it be safe? I'm thinking I need to make it a tight fit, and can drill and tap a small allen bolt in there so it can't back out. Epoxy, maybe?

    Most of the steerer tubes for bonded clamp forks rely on the lower pinch bolt to secure the steerer tube. Terminaut's was a press-in snug fit.
    Last edited by pimpbot; 07-23-2011 at 09:11 AM.

  2. #2
    DIY all the way
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    A pic of your problem may allow better advice


    Magura

  3. #3
    All Lefty's, all the time Moderator
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    A PBR upgrade would drop 1/2 lb.
    This is a Pugs not some carbon wannabee pretzel wagon!!

    - FrostyStruthers



    www.mendoncyclesmith.com

  4. #4
    ballbuster
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    yeah, thinking of that

    Quote Originally Posted by MendonCycleSmith View Post
    A PBR upgrade would drop 1/2 lb.
    Heh... that is probably my best dollar to gram to performance mod right there.


    Quote Originally Posted by Mr.Magura View Post
    A pic of your problem may allow better advice


    Magura

    Sure, here's a pic. Not sure it tells you much, but I like posting my porn.


  5. #5
    DIY all the way
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    Hmm, make one of carbon. That would make it both lighter and more rigid.


    Magura

  6. #6
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    Counting out the above solution, a headset reducer ought to do the trick, no?

    Had you been around my neck of the woods, we could just have machined an adapter to fit your original clamps.

    Magura

  7. #7
    ballbuster
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    Heh....

    Quote Originally Posted by Mr.Magura View Post
    Counting out the above solution, a headset reducer ought to do the trick, no?

    Had you been around my neck of the woods, we could just have machined an adapter to fit your original clamps.

    Magura
    There's always Paypal and Shipping! Just be sure to stamp 'Made in Denmark by real Democratic Socialists for a fair wage, not in China by forced labor at gunpoint for $0.02" on it. I would be proud to fly that flag.

    Then again, I can probably find somebody who can do that locally if I get them a drawing.

    I think any Lefty adapter steerer tube would work. I just have to figure out a way to fix it in place safely, and so it doesn't creak. I can drill out the rivet and press out my Cannondale lower crown from the 1.5 steerer tube, and use that. The problem is mostly that the aftermarket steerer tube adapters aren't meant to be press in fit. They are relying on the lower pinch bolt that my fork clamps don't have.

  8. #8
    DIY all the way
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    Quote Originally Posted by pimpbot View Post
    There's always Paypal and Shipping! Just be sure to stamp 'Made in Denmark by real Democratic Socialists for a fair wage, not in China by forced labor at gunpoint for $0.02" on it. I would be proud to fly that flag.

    Then again, I can probably find somebody who can do that locally if I get them a drawing.

    I think any Lefty adapter steerer tube would work. I just have to figure out a way to fix it in place safely, and so it doesn't creak. I can drill out the rivet and press out my Cannondale lower crown from the 1.5 steerer tube, and use that. The problem is mostly that the aftermarket steerer tube adapters aren't meant to be press in fit. They are relying on the lower pinch bolt that my fork clamps don't have.
    In case, let me know, and I'll see if I can sort you out.

    Have you gotten the Carbenix piece yet? It should have reached you days ago by now.


    Magura

  9. #9
    ballbuster
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    Yeah, Tak!!

    Quote Originally Posted by Mr.Magura View Post
    In case, let me know, and I'll see if I can sort you out.

    Have you gotten the Carbenix piece yet? It should have reached you days ago by now.


    Magura
    It just showed up yesterday, actually. It just happened to be an office day for me.

    Still staring at it... trying to decide what to do with it.

  10. #10
    DIY all the way
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    Quote Originally Posted by pimpbot View Post
    It just showed up yesterday, actually. It just happened to be an office day for me.

    Still staring at it... trying to decide what to do with it.
    Well, if you make a Z shaped cut in it, you get a pair of pads with heatsinks.
    Finns can be cut with a saw, the rest can as well, and flattened with a file.

    There you go, a bit of modern kitchen table technology


    Magura

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