This illustration works unless you're trying to match up Cinelli's sizing. They measure the extension perpendicular(90*) to the quill. In general, that means a Cinelli stem labeled 115 will measure @ ~120mm per that illustration.
Jim Carter Mountain Brook, Alabama United States of America
________________________________ From: "Stronglight49@aol.com" <Stronglight49@aol.com> To: classicrendezvous@bikelist.org Sent: Sat, January 1, 2011 10:50:41 PM Subject: Re: [CR] Measuring Stem Extension Illustration ?
Richard,
Here is a pretty simple and clear illustration (link originally submitted on RoadBikeReviews.com forums):
http://i32.photobucket.com/
BOB HANSON, ALBUQUERQUE, NEW MEXICO, USA