I think it was really the Sedis Sport that changed the rules about gear combinations, as it was much more flexible and smoother than earlier chains. On classic bickes, I usually use Sedis Sport, its Sachs descendants, or a modern 7/8 speed chain. A Regina Oro may be authenic, but doesn't shift as well.
Regards,
Jerry Moos
Houston, TX
<classicrendezvous@bikelist.org> Sent: Tuesday, September 02, 2003 10:21 AM Subject: Re: [CR]small-small and big-big combos
> Good point! I just set my '58 Hetchins up with a Benelux shifting an
stiff 1/8" Reynold Elite chain across a 4 speed Cyclo 14-20 freewheel with a
single Chater Lea 48T chain ring.. I could not bare the noise I would get
in the 14T gear - in fact the chain dropped on several occaisions in
protest. I switched to a modern 1/8" cheap BMX chain and operations are as
smooth as silk, although it does not shift quite as crisply.
>
> Paul Raley
> Leonardtown MD
>
> "Raoul Delmare" <Raoul.L.Delmare@worldnet.att.net> wrote:
>
> >Hey Thanks Steven ,
> >
> > Somehow I'd failed to look at it that way . Explains it very well .
> >Chain stiffness !
> >
> > And it certainly helps explain why the first cable-operated derailleurs
> >were for :
> >
> >3-speeds with 1/8 chain
> >
> >4-speeds with 3/32 chain
> >
> > I've always winced at the thought of trying to put very much side to
> >side deflection on a 1955 1/8 inch chain !
> >
> > Raoul Delmare
> > Marysville Kansas
> >
> >
> >----- Original Message -----
> >From: <themaaslands@comcast.net>
> >Cc: <classicrendezvous@bikelist.org>
> >Sent: Tuesday, September 02, 2003 9:19 AM
> >Subject: Re: [CR]small-small and big-big combos
> >
> >
> >> Marcus wrote:
> >>
> >> > I know most of the literature says don't use the small-small or
big-big
> >> > combinations. Doesn't this generally refer to triples and/or modern
> >bikes
> >> > with wider spacing? I would think that on bikes in the CR timeframe,
> >with
> >> > double chainrings, cross-chaining would not be as big of an issue,
> >unless
> >> > the chainstays were really short.
> >>
> >> Actually the crossing on older bikes was far more problematic than with
> >new
> >> bikes. Modern chains are now so flexible that most can handle quite
severe
> >> sideways bending, something that was definitely not possible in the
> >classical
> >> era. As the chains didn't flex, this meant extreme pressure on the
teeth
> >of
> >> both chainrings and freewheel. Friction derailleurs on the other hand
do
> >make
> >> keeping derailleurs in check with extreme angles easier.
> >>
> >> Steven Maasland
> >> Moorestown, NJ
> >> _______________________________________________
> >
> >
> >_______________________________________________
> >
>
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