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All Carbon Coker

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rec.sport.unicycling
Published
19 February 2008
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20 February 2008
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bubbaeck
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  1. Has anybody thought to make an all-carbon coker, using some of the same
    technology used in bikes? It could be really light. Carbon frame,
    seatpost, rim, seat... It would probably weight 5 pounds! Or would the
    unique stresses of a unicycle make this not work.. I can understand not
    using carbon for mUni for the strenght, but for the road it should work
    alright...

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  2. It's been well and often thought of, but other than the custom one-off
    carbon 36" frame on Flickr (I forget whose it was), no one has been
    able to interest a manufacturer such as Giant or others with facilities
    to make such a thing.

    Plus you still have all the design issues to grapple with, regardless
    of what materials the frame is made of. It'd be nice to see a frame
    with modular bearing holders so that you could use either 40, 42, or
    44mm bearings, thus opening it up to using just about any hub.

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  3. bubbaeck said:

    It would probably weight 5 pounds!

    I think a Coker tire weighs about 5 pounds. In other words, there's a
    limit to how light you're going to get as long as we're using the
    existing tires and rim sizes.

    Here's 'Scot Cooper's one-piece carbon 36\"'
    (http://www.unicycling.smugmug.com/gallery/2411134#129900687). Looks
    like at the time (two years ago) it also had a carbon seat and post,
    but probably conventional rim (airfoil) and hub.

    It would be hard to make a really big wheel that's really light,
    without making it really weak. I'd rather improve my fitness level with
    something heavier that's a lot less maintenance-intensive.

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    johnfoss

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  4. Yeah, modular bearing holders (or some sort of industry standard) would
    be nice... wow.. i didn't know a coker tire weighed that much...

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  5. FYI: The frame was made by Calfee

    http://www.calfeedesign.com/

    I believe there was a dialog with Calfee regrarding making a carbon
    rim, but it was cost prohibitive.

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    <> Unicycle for (reducing the) Buddha <><


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  6. johnfoss said:

    Here's 'Scot Cooper's one-piece carbon 36\"'
    (http://www.unicycling.smugmug.com/gallery/2411134#129900687).

    That is one of the most beautiful things I have seen. 😎 I'd
    heard rumour of a carbon 36" frame, but never seen it before.

    Any idea how much it weighs? A Nimbus 36 frame is 1.1kg, I think a
    standard steel frame is about 950g and an aluminium one (like the
    up-coming KH36) I expect to be about 700g. Is this carbon beauty much
    less than that?

    They're silly little savings considering the cost and effort, but still
    it's very cool.

    Sam

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  7. Well 'i know they make giraffe unicycles, just like the one they sell on
    UDC UK.' (http://tinyurl.com/2o5lk) So i guess a carbon fibre coker
    would be awesome to make/own/buy. :p

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  8. And there is Magura brake mounts on the Carbon frame. Wow cool!

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