Whoa !
Good advice !
Sorry that the fixed-gear portion didn't sink into my brain !
Good advice ! Warning ! Danger !
Raoul Delmare
Marysville Kansas
> Dan asked:
>
> > I'm expecting a 46 tooth Thanet eliptical chainring to be shipped soon
for
> my Jack
> > Taylor fixed gear with a bolt circle that fits the Cyclotourist, Nervar,
> Stronglight arms
> > with the really tight bolt circle. My question is: How does the wide
> part orient itself
> > to the crankarm? I can have it perpedicular or in any of four other
> orientations. Its
> > enameled and I'd just as soon get it right the first time. Does anyone
on
> the list have
> > experience with these? Hilary said that these were quite popular in the
> '30's and '40's.
> > I expect mostly for time trialing, but I'd like to know more.
>
> I don't have any direct experience with such chainrings but it strikes me
as
> rather odd to put an elliptical chainring on a fixed gear. It would seem
to
> me that this is an invitation to throw the chain. Perhaps the ellipse is
> small enough that the ideal chain length at the largest and smallest part
of
> the ellipse do not vary sufficiently to allow for chain slack?!
Personally,
> I wouldn't put anything other than a perfectly round and aligned chainring
> on a fix (or on the timing chain of a tandem) because of the possible dire
> consequences of a thrown chain.
>
> Hopefully somebody else has more immediate knowledge.
>
> Steven Maasland
> Moorestown, NJ
>
>
>
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