Re: [CR] Sachs 7-speed Freewheel cog naming convention

(Example: Framebuilders:Cecil Behringer)

From: "Andrew R Stewart" <onetenth@earthlink.net>
To: <classicrendezvous@bikelist.org>
References: <mailman.11431.1249997836.344.classicrendezvous@bikelist.org>
In-Reply-To:
Date: Tue, 11 Aug 2009 10:10:56 -0400
Subject: Re: [CR] Sachs 7-speed Freewheel cog naming convention


I'll just add that there were two versions of Sachs cogs. What I know as the 1st generation, around 1995, that used 2mm thick cogs (and narrower spacers to maintain the 5mm c-c cog spacing) and the 2nd generation. The 2nd generation (1.8mm thick cogs and thicker spacers) is what you'll see mostly, having replaced the 2mm version very early on. But do be careful in mixing the two standards. Depending on your system's sensitivity the slight change to the c-c spacing can make index coordination a moving target. The 2nd version runs quieter and smoother.

Andy Stewart Raleigh, NC

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Message: 2 Date: Tue, 11 Aug 2009 03:17:39 -0400 From: <Stronglight49@aol.com> Subject: Re: [CR] Sachs 7-speed Freewheel cog naming convention To: <chris@eorbit.net>, <classicrendezvous@bikelist.org> Message-ID: <cba.3abf5c77.37b27513@aol.com> Content-Type: text/plain; charset="US-ASCII"

Chris,

I just scanned this page from an old QBP wholesale catalog:

http://www.flickr.com/photos/stronglight/3810990094/

The data and illustrations at the lower right portion of the page should answer your questions about the cog lettering and their placements on the 7-speed freewheel bodies.

Freewheels have become increasingly rare components, so this info had been omitted from their more recent catalogs. You may want to download the larger sized image for future reference.

Yep, this is why I save my old catalogs.

Cheers!

BOB HANSON, ALBUQUERQUE, NEW MEXICO, USA

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