Troy,
Apparently I do not have the splined cog you require. We have seen hubs from the 30's with 3 notch cogs. Maybe their drivers we changed as well.
OK, perhaps you should move up into the 60's and get a notched 18T cog and driver to match.
All the best,
Gilbert Anderson
The North Road Bicycle Company your bicycle outfitter 519 W. North St. Raleigh, NC 27603 USA ph toll free in USA :800/321-5511 Local ph: 919/828-8999 E-Mail: cyclestore@aol.com
In a message dated 5/13/01 1:17:00 AM, twar@hotmail.com writes:
<< I have two with the 12 spline pattern, a 49 FM and a 52 AM. I have also seen the 3 spline pattern from this era as well.? My 51 FW and 53 Am both have the 3 spline cog.
Regards, Troy "?" Warnick Olympia, WA
>From: Sheldon Brown <CaptBike@sheldonbrown.com>
>To: "Hilary Stone" <Hilary.stone@tesco.net>, Troy Warnick
><twar@hotmail.com>, classicrendezvous@bikelist.org
>Subject: Re: [CR]Sturmey cog needed
>Date: Sat, 12 May 2001 17:05:17 -0400
>
>Hilary Stone wrote:
>>Sturmey Archer's hubs in the 1940s and 1950s used two types of sprocket -
>>screw-on mostly on their basic AW and AB, FWs, etc and a 12 spline
>>sprocket
>>on their upmarket hubs FM, FC, ASC, AC etc. This was also used on their
>>pre-war 2-speed fixed hubs TF, TFB, T and TC, and the 3-speed KS and KSW
>>hubs. The familiar 3 spline sprockets were fitted from 1957 onwards right
>>across the range of hubs. But the pre-war hubs can only use the 12 spline
>>pattern - this isn't strictly true as the 3-spline sprockets can be
>>modifified just a little with a Dremel and fit on the 12 spline drivers.
>>Post war hubs can have their drivers changed for later 3 spline drivers
>>and
>>that is a very simple operation.
>
>I have occasionally seen the 12 spline type on very old hubs, but I
>believe the changeover to the 3-spline type happened well before
>1957. Indeed, my '52 ASC uses a 3-splined sprocket, and I've seen
>lots of late 40's hubs with these. I've paid attention to this for a
>long time, as I used to be diligently hunting for the older threaded
>drivers for use with hybrid gearing (I've gotten as many as 7
>sprockets onto S-A hubs this way.)
>
>Pre-war S-A hubs are extremely rare in the U.S. British bikes were
>mostly unknown here until returninv veterans started bringing them
>home aftwer WWII
>
>Sheldon "Hercules Stuck With Threaded Drivers Long After S-A Ditched
>Them" Brown
>Newtonville, Massachusetts
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