O Symetric Chain Rings

[Edogawakikkoman]

http://www.suhaimi-isa.com/2008/07/23/o-symetric-chain-ring/

I had never seen one of these or knew of them till last night until I saw a guy using one.

Anybody here ever try one?
How was it?

 

[kiwisimon]

Biopace reincarnated. See Sheldon.http://www.sheldonbrown.com/biopace.html

 

[msen]

This was a while back, since then they've came back in quite a big way with Sky at last years Tour etc..

Has anyone any experience/further thoughts on these or the Rotor q rings. Waste of time/money at worst / marginal gains at best ?

 

[msen]

Just actually clicked on the link above and it doesn't work. this is what i'm talking about http://www.zetatrading.jp/product/osymetric.html or http://www.osymetric.com/

 

[dgl2]

Here is my early review.

http://positivo-espresso.blogspot.jp/2014/01/pedaling-rectangles-osymetrically.html

Some other links included embedded in my post.