Roger Durham (Bullseye) made a very eccentric ring to be used as a single.
Joe
At 11:04 AM 1/31/01 -0500, Richard Rose wrote:
>Others will know more about this than I but, I think that the theory behind
>this was that the elliptical shape of the chainring would eliminate the
>"dead spot" in the typical riders pedaling rotation. I seem to recall
>reviewers thinking that it actually did work but felt "weird". I also seem
>to recall that the idea won more favor with triathletes (what idea
>doesn't?), than with roadies.
>Richard (like mine round too), Rose (Toledo, Ohio)
>----- Original Message -----
>From: Rick Miller <millere@telenet.net>
>To: <classicrendezvous@bikelist.org>
>Sent: Wednesday, January 31, 2001 12:04 PM
>Subject: [CR]chainrings
>
>
>> I have an early 80's touring bike equipped with Shimano Bio-Pace rings.
>> I've rarely seen them used and wonder what their purpose was? I suppose it
>> should be obvious but I prefer the round rings. Thanks much. Rick
>> millere@telenet.net