Re: SA hub pics
Per the 1952 Sturmey Archer Trade Parts Catalog I found on the
Sturmey Archer Heritage web site SA offered 14 through 20 tooth 3
spline sprockets during that time. They may have had other sizes
as 'export only" items or, as I speculated earlier, the sprocket
could well be from a non SA accessory maker and fitted by a dealer
at the time of the original bike's sale or by the owner. Presumably
a rare item.
Also rare, but listed in the catalog, would be 12 spline sprockets
and threaded sprockets as used on certain specialty and older hubs.
--- In Geared_hub_bikes@yahoogroups.com, "Rich Wood"
> Sounds rare to me though if you can find a parts manual from the
> correct era you may find that SA offered a wider range of input
> sprockets than they currently do. Back then British bikes with 3
> speed hubs were being exported around the world, including to
> countries with mostly poor to nonexistent paved roads. SA could
> well have offered input sprockets to provide the very low gearing
> needed for such conditions. Kind of an attempt at early off road
> bikes. Early British mountain bikes ;-)
> Rich Wood
> --- In Geared_hub_bikes@yahoogroups.com, "brandon"
> <rogersbrandon96@> wrote:
> > Thanks Rich my hub is 1950s/1960s and the sprocket is (i am
> > positive) original so it must be pretty rare don't you think?
> > it is the same chain width size as my other SA hub sprockets and
> > sprocket is in the same condition as the hub.
> > Brandon.
> > --- In Geared_hub_bikes@yahoogroups.com, "Rich Wood"
> > <astronut1001@> wrote:
> > >
> > > Brandon;
> > >
> > > Seeing as how SA sprockets are interchangeable I doubt if they
> > > delivered any with large sprockets, though a dealer or user
> > > change to whatever they wished depending on availability.
> > >
> > > Harris Cyclery lists SA and/or Shimano sprockets from 14 up to
> > > teeth currently. All will fit the 1950's and later SA Hubs
> > > the 8 speed. Near as I could tell from your photo the
> > > your hub is about a 26 tooth one. Never seen such a sprocket
> > > mentioned for a geared hub but see my earlier posted comment
> > > possible aftermarket items or converting Shimano freehub
> > >
> > > I have seen mention that two other designs of sprockets were
> used by
> > > SA in the past, not compatible with the current design.
> > >
> > > Except for Rohloff, SA 8 speed and the briefly made Sachs 12
> > > hub all current hubs from SA, SRAM and Shimano use the same
> > > of interchangeable input sprockets. Per my understanding the
> > > difference, other than number of teeth offered by each
> > > is that SA sprockets require 1/8" chain while Shimano and SRAM
> > > sprockets can use either 3/32" or 1/8" chain.
> > >
> > > Rich Wood