Re: [CR] Measuring Stem Extension Illustration ?


Example: Events:Cirque du Cyclisme:2004

From: "Andrew R Stewart" <onetenth@earthlink.net>
To: <Stronglight49@aol.com>, <classicrendezvous@bikelist.org>
References: <4fc60.78986f9.3a515e21@aol.com>
In-Reply-To: <4fc60.78986f9.3a515e21@aol.com>
Date: Sun, 2 Jan 2011 00:14:02 -0500
Subject: Re: [CR] Measuring Stem Extension Illustration ?


Most manufactures measure their stems from the steerer insert/quill center to the HB clamp center. Not along the top of the extension, quill draw bolt center to bar clamp center. The difference is about 4mm. Enough to confuse what you're actually trying to get/sell.

This is assuming an approximately 72*-74* angle between the steerer quill and the horizontal extension.


----- Original Message -----
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Sent: Saturday, January 01, 2011 11:50 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/albums/d7/k4drd/Bicycles/QuillStem.jpg
>
> BOB HANSON, ALBUQUERQUE, NEW MEXICO, USA