Re: [CR]Sturmey cog needed

(Example: History:Norris Lockley)

In-Reply-To: <E14yfvY-0007Ws-00@receipt.tesco.net>
References:
Date: Sat, 12 May 2001 17:05:17 -0400
To: "Hilary Stone" <Hilary.stone@tesco.net>, Troy Warnick <twar@hotmail.com>, classicrendezvous@bikelist.org
From: "Sheldon Brown" <CaptBike@sheldonbrown.com>
Subject: Re: [CR]Sturmey cog needed


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 +------------------------------------------------+ | If you don't want your message to get to me, | | insert **NO-SPAM** into my email address. | +------------------------------------------------+
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