RE: [CR]the odds on tandem transfer cog tooth count

(Example: Component Manufacturers:Cinelli)

In-Reply-To: <000001c2fe46$7234e470$7f00000a@SKIDROW>
References: <000001c2fe46$7234e470$7f00000a@SKIDROW>
Date: Wed, 9 Apr 2003 00:16:17 -0400
To: "Mark Petry" <mpetry@bainbridgeisland.net>, "'David Benson'" <david@worrall.co.nz>, <classicrendezvous@bikelist.org>
From: "Sheldon Brown" <CaptBike@sheldonbrown.com>
Subject: RE: [CR]the odds on tandem transfer cog tooth count


Mark Petry wrote:
>
>As for your measurements of the boob toob, the radius of the eccentric
>will more than compensate for any irregularities in chain length. The
>prime number hypothesis stands until disproved with REAL data! And none
>of this half link stuff (altho I must admit I stopped for a moment to
>consider the implications of this un-anticipated development.

Primeness is not relevant, but oddness/evenness does make a difference. Teeth may wear more evenly with odd chainrings, but if you use even-numbered rings, _and_ maintain them in the same phase relationship with the chain, the system can last much longer.

I explain this in detail in my article on Tandem Synch Chains.

See: http://sheldonbrown.com/synchain.html#chainring
>WHO has read the masterpiece / tour de force "Cryptonomicon" by Neal
>Stevenson ?

Oooh, mememe! Wonderful book, like all of Stephenson. Start with Snow Crash...

Sheldon "Stephenson, Brin and Turtledove" Brown Newtonville, Massachusetts +---------------------------------------------------+ | In theory, there's no difference between theory | | and practice; but, in practice, there is. | +---------------------------------------------------+, --
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