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  1. #1
    Hello. JDMFanatic's Avatar
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    I saw this and... What the...?




    What the hell is the point of this? Dual drive?
    ▂▅▇█▓▒░◕‿‿◕░▒▓█▇▅▂

  2. #2
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    i saw this too.

    'only person in the world'

    what a rip off.

    oh, craigslist

  3. #3
    Pokemon Master Darth_Firebolt's Avatar
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    is one single speed and one fixed?
    i remember reading about a dual drive track bike sometime ago. the singlespeed side had a bigger cog to accelerate faster, and the locknut on the fixed side was spaced so that a few revolutions of the wheel would spin the fixed cog into the lockring.

  4. #4
    ( 8n(|) DOH!! Pwnt's Avatar
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    I bet he goes twice as fast!
    _____________________________________________

    I love noodles.

  5. #5
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    Quote Originally Posted by Darth_Firebolt View Post
    is one single speed and one fixed?
    i remember reading about a dual drive track bike sometime ago. the singlespeed side had a bigger cog to accelerate faster, and the locknut on the fixed side was spaced so that a few revolutions of the wheel would spin the fixed cog into the lockring.
    no, its dual fixed, which is redundant.

  6. #6
    GONE~
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    Reminds me of a thread about a month ago.

    Quote Originally Posted by ppc View Post
    I just came across this page that deals with the bizarre idea of running two chains on a bike, when I read the following nugget at the end of the page:

    However it got me thinking about another bike I'd seen with a similar set-up but this one made a lot of sense. In 1982 Canadian rider Jocelyn Lovell rode the kilometre time trial at the World Championships in Leicester, England using a bike with two transmissions. His arrangement gave him two gear ratios, a lower gear to get away from the line and a higher gear that kicked in after about seventy metres. His ride in Leicester wasn't as good as he hoped for but the transmission worked well and it could not be faulted by the UCI commisaires.



    Jocelyn's bike had a freewheel sprocket on the normal right hand side and a fixed sprocket on the left hand side. As he moved away from the line he drove through the RH sprocket and the left hand fixed sprocket began to unscrew from the hub. It being of smaller diameter it turned at a slower rate than the RH sprocket and being on the "wrong side" of the hub it would naturally unscrew. After about seventy metres the LH fixed sprocket came up against the lockring and at that point drive was through the LH side and the RH sprocket freewheeled. The distance traveled before the higher gear engaged could be adjusted by setting the position of the lockring. The bigger the space between lockring and sprocket at the start the longer the distance before the higher gear engaged.
    Jocelyn experimented for some considerable time to come up with a combination of sprockets and chainrings that would not only give two suitable ratios but that would need chain lengths that would be at the correct tension. He settled on a low gear of 42x13 (87.2") and a high gear of 53x15 (95.4")


    Wow, that is incredibly clever and a very elegant working around (or within?) the UCI rules. Lovell was a genius. I'm almost tempted to try it myself to see what it feels like

    (There's just a small misunderstanding of how the system worked in the above explanation: the LH sprocket unscrews because it is smaller and thus spins *faster* than the wheel in the first 70m, not slower)

  7. #7
    dsh
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    Quote Originally Posted by Darth_Firebolt View Post
    is one single speed and one fixed?
    i remember reading about a dual drive track bike sometime ago. the singlespeed side had a bigger cog to accelerate faster, and the locknut on the fixed side was spaced so that a few revolutions of the wheel would spin the fixed cog into the lockring.
    Yeah pretty sure it's not that.

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  9. #9
    Antarctica awaits WoundedKnee's Avatar
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    I was thinking about this awhile ago, what if you did that with two freewheels? Would you be able to ride forward, backward, AND coast? My head asplode

  10. #10
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    Quote Originally Posted by Poster on CL
    dual drive...this makes the frame so stiff and responsive its amazing!
    Wut

  11. #11
    dsh
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    Quote Originally Posted by WoundedKnee View Post
    I was thinking about this awhile ago, what if you did that with two freewheels? Would you be able to ride forward, backward, AND coast? My head asplode
    No, it would be the same as a fixed gear.

    Grab your geared bike and roll it backwards.
    Watch the cranks.
    That would happen.

  12. #12
    Antarctica awaits WoundedKnee's Avatar
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    Quote Originally Posted by dsh View Post
    No, it would be the same as a fixed gear.

    Grab your geared bike and roll it backwards.
    Watch the cranks.
    That would happen.
    I dunno man.

  13. #13
    Senior Member ticotico's Avatar
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    seent it so i had to buy it

  14. #14
    My name is Alex Lilcphoto's Avatar
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    Hey drive side photo FTW!

  15. #15
    Senior Member bentchamber's Avatar
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    I want that frame for my girlfriend.
    Coolest dual drive bikes are the ones that are set up so when you ride forward its one gear, but pedal backwards and its another.

  16. #16
    THE STUFFED Leukybear's Avatar
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    Quote Originally Posted by Lilcphoto View Post
    Hey drive side photo FTW!
    I know! Idiot proof!

  17. #17
    Senior Member seau grateau's Avatar
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    More power!!!
    Quote Originally Posted by adriano View Post
    thanckx.
    Quote Originally Posted by Nagrom_ View Post
    "I made love to your mother dozens of times last week, and she doesnt know what a worn chain ring looks like"

  18. #18
    Senior Member bentchamber's Avatar
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    I was thinking, and If there was a place to hook the chain, and those two were geared different, you could just take off one side of chain if you needed to go up a really long hill, 2 gears without the flipping and flopping

  19. #19
    The Stark Fist of Reality Scrodzilla's Avatar
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    "the bike is pimp and is def to make a scene in the city!!!"

  20. #20
    a bored kid hpmcardle's Avatar
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    Whoever gets this should set the crank arms in phase with each other so they can double pump. Then they'd be two times as fast as two times as fast as a normal fixie!
    Quote Originally Posted by cc700 View Post
    i'm so icy hot i need to put bleach on my skids to keep my underwear as fresh as my street cred.

  21. #21
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    http://www.municycle.ca/nimbus-perfo...ffe-p-112.html

    giraffe unicycles have had dual drive for long.
    This is meant to avoid the flex of the frame and pulling the wheel out of alignement when you mash on the pedals.
    Though this has proven to be useful on unicycle, i doubt it is on a fixie.

  22. #22
    The Stark Fist of Reality Scrodzilla's Avatar
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    Dude should mount both crank arms pointing in the same direction. Kangaroo bike FTW.

  23. #23
    Senior Member riot2003's Avatar
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    Quote Originally Posted by Scrodzilla View Post
    Dude should mount both crank arms pointing in the same direction. Kangaroo bike FTW.
    this
    Quote Originally Posted by seau grateau View Post
    My nuts are always sliding all over the place when I skid. Need some grip. For my nuts.

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