George, if you are installing a Cinelli bar into a Cinelli stem, there should be no problem.
I assume that all or most here know this, Cinelli (older parts) were 26.4 mm and should be kept brand specific. Often, much too often, bikes come into my shop with a TTT bar in a Cinelli stem.
Chuck Hoefer
Vista, California USA
From: George Hollenberg <ghollmd@gmail.com> Subject: [CR] Cinelli Aluminum Bars-Engraving Protection During Stem Placement To: "Classic Rendezvous" <classicrendezvous@bikelist.org> Date: Saturday, September 5, 2009, 1:07 PM
Aside from using a spreader, can any additional things be done to protect the engravings when placing a stem on older aluminium Cinelli bars?
-- George
George Hollenberg MD
CT, USA