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 Post subject: Check out my ring piece
PostPosted: Tue Aug 21, 2007 8:42 pm 
retrobike rider
retrobike rider
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Joined: Thu Aug 02, 2007 3:15 pm
Posts: 363
Location: Manchester
Now even I know there's something not right here!

(38t fitted to my "new" hydrotech!


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 Post subject:
PostPosted: Tue Aug 21, 2007 8:52 pm 
Retro Guru
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Joined: Thu Mar 08, 2007 10:36 pm
Posts: 315
Location: Snodland, Kent
Erm...its meant to be like that. (Biopace) :lol:


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 Post subject:
PostPosted: Tue Aug 21, 2007 10:54 pm 
Old School Grand Master
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Joined: Tue Jul 05, 2005 3:14 pm
Posts: 13411
Location: Warwick
Yep thats supposed to be like it. I have a few of them lying about. Great!


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 Post subject:
PostPosted: Tue Aug 21, 2007 10:59 pm 
Newbie

Joined: Tue Aug 21, 2007 10:43 pm
Posts: 2
Location: Linlithgow, Scotland
Meant to be like that. On loads of bikes around 1990. Some riders complained of sore right knees using them.


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 Post subject:
PostPosted: Wed Aug 22, 2007 12:38 am 
B.o.T.M. Winner / Feature Bike
B.o.T.M. Winner / Feature Bike
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Joined: Tue Dec 13, 2005 3:26 pm
Posts: 6191
Location: Tilting at windmills and shouting at the rain.
Great link from the most beardy website in the world. I have a lovely set of oval rings from this guy (oriented in the right way, not the shimano way)


http://www.highpath.net/cycles/ovals/01.html


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 Post subject:
PostPosted: Wed Aug 22, 2007 8:42 am 
retrobike rider
retrobike rider
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Joined: Fri Nov 11, 2005 10:58 am
Posts: 972
is that an egg ring?


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 Post subject:
PostPosted: Wed Aug 22, 2007 8:50 am 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
My first MTB had those. A late eighties Dawes Wildcat with Exage groupo. A year or so later the shape was less extreme and the year after that they were round again! They remained popular in the triathalon world for a bit as the leg action when using them is more akin to running. Seem to remember being told to rotate them clockwise by 90 degrees or something to ease pressure on the knees and make for a more efficient pedal action.


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 Post subject:
PostPosted: Wed Aug 22, 2007 9:31 am 
rBoTM Winner
rBoTM Winner
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Joined: Tue Apr 25, 2006 12:06 pm
Posts: 1443
Location: Vienna, Austria
Nope, never seen one of those before


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 Post subject:
PostPosted: Wed Aug 22, 2007 9:33 am 
retrobike rider
retrobike rider
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Joined: Thu Aug 02, 2007 3:15 pm
Posts: 363
Location: Manchester
oh well....maybe I know even less than I thought I did! nevermind..


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 Post subject:
PostPosted: Wed Aug 22, 2007 9:56 am 
Posh Mark
Posh Mark
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Joined: Wed Apr 18, 2007 2:49 pm
Posts: 5982
Location: As far from the city as you can be ....
I have a triple chainset full of the buggers (biopace) on my 1990 Peugeot commuter –

I get on really well with then – Going singlespeed so will just be using the 48!

A good link for more info:

http://www.sheldonbrown.com/biopace.html


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