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Thread: Flat front gear

  1. #1
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    Flat front gear

    Is it a distortion of the photo, or is that front large cog look flattened out?

    http://www.roadbikeaction.com/Latest...l-Project.html

    Scroll 3/4 of the way down

  2. #2
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    That does look funny, but I'd guess it's just a photographic artifact from compression or whatever.
    The biopace chainrings were odd enough; I don't think anyone would like an octagonal one.....

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    To be honest that picture looks legit.

  4. #4
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    Team sky was running chainrings like that in the tour....

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    This should answer the questions...

    O.Symetric's Chainrings

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    You just can't keep a good idea down....Even if it didn't work much the first time. I notice the reviewers were not particularly impressed.

  7. #7
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    Quote Originally Posted by Bikewer View Post
    You just can't keep a good idea down....Even if it didn't work much the first time. I notice the reviewers were not particularly impressed.
    I think you're referring to Biopace, and presuming all ovals are the same, which they are not. You should read this report before jumping to conclusions like that:

    http://www.noncircularchainring.be/p...elease%202.pdf
    Chaad--'95 DeKerf Team SL, '02 Lemond Buenos Aires, '05 Novara Buzz, '73 Schwinn Collegiate, '06 Mountain Cycle Rumble, '09 Dahon Mariner D7, '12 Mercier Nano, '12 Breezer Venturi

  8. #8
    Senior Member iforgotmename's Avatar
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    I just bought 3 biopace chainrings off of ebay for $5, figured it would be worth a try.

  9. #9
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    Hehe- a highly technical article that's way beyond my limited mathematical and engineering abilities. The idea is one of those that "seems" sound; yet as the article notes, Biopace was essentially a disaster. The other designs just seem to my limited understanding to be variations on a theme.
    The primary complaint from riders, as I recall (and I'm old enough to recall) was that they "felt funny".
    I'll reserve judgement until we see if anyone buys this new effort.

  10. #10
    Senior Member cyclist2000's Avatar
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    I have some of the original biopace chain rings on my really old mountain bike. I never could feel any difference but I rarely ride that bike.
    I don't do vintage, I bought them new, rode them, kept them. Now they are just old bikes
    http://www.flickr.com/photos/bustercrb/sets/72157623483647522/

  11. #11
    Stealing Spokes since 82' Fizzaly's Avatar
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    i used to run a 50 bio pace i believe it was a 2nd gen. i could notice a difference on that big of a ring but on the smaller ones its hard to tell. To each their own i guess

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