[CR] Why horizontal dropouts?

(Example: Production Builders:LeJeune)

Date: Wed, 26 Aug 2009 14:16:37 -0700
From: "David Feldman" <feldmanbike@yahoo.com>
To: <classicrendezvous@bikelist.org>
Subject: [CR] Why horizontal dropouts?


In the case of Campagnolo ends, they're a direct descendent of the toothed Cambio Corsa/PR ends, the transition away from which started in 1953 with the Gran Sport derailleur.  A practical reason for them also dovetailed with the introduction of the Gran Sport--sometimes the "drop paralellogram" derailleurs benefit from slight adjustments in wheel placement which serve as a small adjustment in chain length.  Think of trying to persuade a Nuovo Record derailleur to shift the chain to a 28 or 30 tooth cog--manipulating wheel location is one way to make it happen and isn't possible with vertical dropouts.
   David Feldman Feldman&#39;s Bicycle Repair Vancouver, WA 360-694-4228/503-998-7249