Before Biopace there was Bullseye!

[pete_mcc]

I know that there were many before these, but I'm a big fan on oval rings: Biopace on my Roberts, Chris Bell on the Fat Ti, these type ones on the Turner from time to time. Just got to make sure they are correctly oriented - 90 degrees around from shimano's orientation to work properly.

Load more info here: http://www.highpath.co.uk/cycles/ovals/01.html
(quality beardy stuff...)

 

[Stick Legs]

Glad to see Chris Bell is still in business!

 

[pete_mcc]

who'd you rather buy top retro chainrings from:

 

[Lysander]

Retro has got to go the Beardy Path, every time...........

Qaulity diagrams too..............*sits sniggering at graph*

 

[dookie]

more area under the curve, i presume?