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Adjustable Cranks

Started by semach.the.monkey · · Last activity · 9 posts · 579 views

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01 / Original postAdjustable Crankssemach.the.monkey · 30 May 2007 02 / This pagePosts 1–9Page 1 of 1 · chronological order 03 / Latest replyPost #9thejdw · 6 Jun 2007

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rec.sport.unicycling
Published
30 May 2007
Last activity
6 June 2007
Original author
semach.the.monkey
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  1. Original post
    semach.the.monkey
    Archived post
    #1

    Ok, so forget your double-drilled cranks, or even your tripple drilled
    cranks, I've been giving some thought to adjustable on-the-fly cranks
    recently. I've had some ideas, but the best idea I came up with last
    night was to look at the patents to see if anyone else has beaten me to
    it.

    So, whilst looking, I stumbled across 'this'
    (http://tinyurl.com/2hau7x)

    I wonder if Kris Holm has looked in to making these?

    Oh, seriously though, I know its probably an obvious assumption, but
    the main forces put upon a crank are when the pedals are in the
    horizantal position right? Decreasing to virtually zero when they're
    vertical?

    STM

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  2. unisk8r
    Archived post
    #2

    Like Smokey the GEICO Biker says: Neat!
    But the system would have to be made of a semi-solid gas to keep the
    weight down.

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  3. unisk8r
    Archived post
    #3
    semach.the.monkey said:

    Oh, seriously though, I know its probably an obvious assumption, but the
    main forces put upon a crank are when the pedals are in the horizantal
    position right? Decreasing to virtually zero when they're vertical?

    Yes. In both forward & backward mode.

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  4. enahs
    Archived post
    #4
    unisk8r said:

    Like Smokey the GEICO Biker says: Neat!
    But the system would have to be made of a semi-solid gas to keep the
    weight down.

    I agree the weight would be too high, plus imaging catching the
    sprocket to the shin!

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  5. Brian O.
    Archived post
    #5

    Talk about q-factor, I've seen better solutions before. Search the
    forums for crazy cranks.

    --
    Brian O.

    mscalisi said:

    We only need one 36" rim, one that doesn't suck. A properly sized KH rim
    (like the 29er only larger) would be awesome.

    'ProjectUNI' (http://www.otherworldsociety.org/projectuni) - The
    Unicyclist PC Game - In Early Development.
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  6. ahollow
    Archived post
    #6

    Here's an idea for a crank plate. It starts at 170mm and goes around in
    10mm increments, all the way down to 90mm. Plate would be aluminum,
    approx 3/8" thick for threading. The black areas are cutouts, and the
    circles the pedal holes. This one is for a cotterless hub, but I guess
    you could do a splined one also.

    If you did a crank grab with these, you could continue to ride on the
    crank itself!

    [image: http://ahollowell.com/uni/crank.jpg]

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  7. texasuninut
    Archived post
    #7

    Another view?

    +-------------------------------------------------------------------+
    |Filename: pathtall.gif |
    |Download: http://www.unicyclist.com/attachment/20437 |
    +-------------------------------------------------------------------+

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  8. mornish
    Archived post
    #8
    ahollow said:

    Here's an idea for a crank plate. It starts at 170mm and goes around in
    10mm increments, all the way down to 90mm. Plate would be aluminum,
    approx 3/8" thick for threading. The black areas are cutouts, and the
    circles the pedal holes. This one is for a cotterless hub, but I guess
    you could do a splined one also.

    If you did a crank grab with these, you could continue to ride on the
    crank itself!

    [image: http://ahollowell.com/uni/crank.jpg]

    I think that that would bend sooooo easily.

    --
    mornish

    aim:kiloornish
    email: mornish AT gmail DOT com

    Spencer said:

    well, at least I'm not drinking my own blood, I only drink other
    people's blood...


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  9. thejdw
    Archived post
    #9
    mornish said:

    I think that that would bend sooooo easily.

    +1, would have to be CrMo

    --
    thejdw

    dunawan said:

    why are koxx one unicycles so costly???

    forrestunifreak said:

    They are expensive because they use only the finest soft drink cans.

    Quoted message said:
    Quoted message said:

    don't follow Jesus, follow me!<<


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