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Old 08-10-10, 05:59 AM   #1
taos07
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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
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Old 08-10-10, 09:49 AM   #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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Old 08-10-10, 11:18 AM   #3
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To be honest that picture looks legit.
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Old 08-10-10, 01:35 PM   #4
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Team sky was running chainrings like that in the tour....
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Old 08-10-10, 02:49 PM   #5
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This should answer the questions...

O.Symetric's Chainrings
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Old 08-10-10, 07:59 PM   #6
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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.
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Old 08-10-10, 09:58 PM   #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
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Old 08-11-10, 05:17 PM   #8
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I just bought 3 biopace chainrings off of ebay for $5, figured it would be worth a try.
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Old 08-11-10, 07:32 PM   #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.
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Old 08-11-10, 08:08 PM   #10
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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.
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Old 08-14-10, 11:55 AM   #11
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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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