Chuck:
Thank you for the clarification that your original post was your opinion.
Greg Parker
P.S. The center section of a 753 top tube (early version) is about .017" thick (a little over 0.4 m.m.) and you can almost squeeze it by hand! I've heard stories of energetic people ripping shifter braze-ons right off of 753 downtubes into their hands by accident - big bummer!! I agree that 0.4 m.m. is right at the limit of usability with steel tubes of conventional diameters.... I still think that the early 753 is VERY cool for lighter riders, tho'
-------------Forwarded Message-----------------
From: INTERNET:chuckschmidt@earthlink.net, INTERNET:chuckschmidt@earthlink.net To: Marc Boral, INTERNET:mbikealive@earthlink.net
CC: , INTERNET:Classicrendezvous@bikelist.org
Date: 10/16/00 5:54 PM
RE: Re: [Classicrendezvous] Mexico vs Super (was: Colnago quality)
Marc,
I'm not a frame builder and I don't play one on Television either, but after 25 years of looking at tubing spec's, "4/10" used in connection with a name of tubing sounds like the thickness dimension of the tubing wall to me.
Also, again I'm not an engineer, but 4/10 of a millimeter would be as thin as you'd ever want to go on a tube set. Actually probably thinner than you'd want to go if you're over 100 lbs soaking wet ;)
Just guessing here, but I bet that Eddy Merckx's hour record bike was 4/10 Record and not the 5/10 Record listed in the Columbus tubing catalog. It only needed to last one hour before "beer canning" a top tube ;)
Chuck Schmidt South Pasadena, California
Marc Boral wrote:
>
> Chuck and Richard seem to be of the opinion that "4/10 Record" refers to the
> guage/thickness. However I do not see the logic. Record tubes are 0.5 mm. for
> triangle tubes and all stays, and 0.8 for the head tube. How do you derive at the "4"
> in "4/10" pertaining to thickness? I was also told by Colnago that Record tubing was
> specked in only certain tubes on the frame, not throughout. So this is why I believe
> that "4/10" refers to how many Record tubes were used. Please submit your input,
> because I certainly do not want to share incorrect info.
>
> Marc Boral
_______________________________________________
----------------------- Internet Header --------------------------------
Sender: classicrendezvous-admin@bikelist.org
Received: from catfood.nt.phred.org (catfood.phred.org [216.39.149.190])
by sphmgaac.compuserve.com (8.9.3/8.9.3/SUN-1.9) with ESMTP id RAA24507
for <gregparker1@compuserve.com>; Mon, 16 Oct 2000 17:54:28 -0400 (EDT)
Received: from phred.org ([216.39.149.189]) by catfood.nt.phred.org with Microsoft SMTPSVC(5.0.2195.2103);
Mon, 16 Oct 2000 14:52:23 -0700
Received: from catfood.nt.phred.org (catfood.phred.org [216.39.149.190])
by phred.org (8.9.1a/8.9.1) with ESMTP id OAA10955
for <Classicrendezvous@bikelist.org>; Mon, 16 Oct 2000 14:54:05 -0700 (PDT)
Received: from hawk.prod.itd.earthlink.net ([207.217.120.22]) by catfood.nt.phred.org with Microsoft SMTPSVC(5.0.2195.2103);
Mon, 16 Oct 2000 14:52:15 -0700
Received: from 216.244.13.179 (pool0569.cvx12-bradley.dialup.earthlink.net [209.179.228.59])
by hawk.prod.itd.earthlink.net (EL-8_9_3_3/8.9.3) with SMTP id OAA08172;
Mon, 16 Oct 2000 14:54:04 -0700 (PDT)
Message-ID: <39EB8732.46FE@earthlink.net>
Date: Mon, 16 Oct 2000 14:55:02 -0800
From: Chuck Schmidt <chuckschmidt@earthlink.net>
Reply-To: chuckschmidt@earthlink.net
X-Mailer: Mozilla 3.04 (Macintosh; I; 68K)
MIME-Version: 1.0
To: Marc Boral <mbikealive@earthlink.net>
CC: Classicrendezvous@bikelist.org
Subject: Re: [Classicrendezvous] Mexico vs Super (was: Colnago quality)
References: <9f.bf42632.271c5c72@aol.com> <39EB3714.2EDB3A32@earthlink.net> <39EB5C36.73B5@earthlink.net> <39EB6B6C.F1ED954@earthlink.net>
X-OriginalArrivalTime: 16 Oct 2000 21:52:15.0984 (UTC) FILETIME=[591CB700:01C037BB]
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=us-ascii
Sender: classicrendezvous-admin@bikelist.org
Errors-To: classicrendezvous-admin@bikelist.org
X-Mailman-Version: 1.1
Precedence: bulk
List-Id: A sharing of vintage lightweight bicycle information and lore <classicrendezvous.bikelist.org>
X-BeenThere: classicrendezvous@bikelist.org