[CR]gearing on classic racing bicycles

Example: Production Builders:Tonard

Date: Tue, 6 Nov 2007 12:05:53 -0500
From: "Scott Loveless" <sdloveless@gmail.com>
To: Classicrendezvous@bikelist.org
Subject: [CR]gearing on classic racing bicycles

Hey, gang.

I've been unsuccessful finding the answers I'm looking for, most likely due to looking in the wrong places. Going through some of the photos at the L'eroica site I see some pictures of bicycles equipped with Campy Cambio Corsa deraillers. It looks like these probably had 3 rear sprockets. Can anyone tell me what a typical setup would have been? I'm interested in the number of sprockets and the tooth count on the sprockets and chainwheel.

Thanks a bunch. Much appreciated. Please let me know if I need to clarify anything.

Scott Loveless
New Cumberland, Pennsylvania, USA