Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site uw-june
Path: utzoo!watmath!clyde!burl!mgnetp!ihnp4!drutx!houxe!hogpc!houti!ariel!vax135!cornell!uw-beaver!uw-june!palmer
From: palmer@uw-june.UUCP
Newsgroups: net.bicycle
Subject: Elliptical Chainrings
Message-ID: <1481@uw-june>
Date: Sun, 20-May-84 20:40:13 EDT
Article-I.D.: uw-june.1481
Posted: Sun May 20 20:40:13 1984
Date-Received: Tue, 22-May-84 07:53:48 EDT
Organization: U. Washington, Computer Sci
Lines: 22

<>

I'm sorry if this question has been recently asked, but I'm new to this
group.

Does anyone know of a source for elliptical front sprockets?  I have
one, (if I ride with a round chainwheel for more than a mile, my knees
start screaming), but my father wants one.

I want a REAL elliptical chainwheel (mine has an height/width ratio of
~2), not one of those squarish things that that Japanese company
(Shumano?) put out.  (I talked to someone in a bike-store, and he said
it was computer designed for maximum efficiency.  I would be willing to
bet that they tweaked the design criteria until they had something
which looked wierd, but could still be shifted by an ordinary
derailleur.)

    I think they are the best things to come along since the "safety
bicycle".  I can't shift the front sprocket (except by hand if things
get desparate) but five speeds are sufficient for the riding I do.

                David Palmer