Re: [CR] Columbus SL "Competition" Tubing


Example: Production Builders

From: "Jon M. Crate" <Jon@FAI.US>
To: <brianbaylis@juno.com>, <verktyg@aol.com>
References: <20100714.191619.9965.1@webmail08.vgs.untd.com>
Date: Thu, 15 Jul 2010 10:16:06 -0400
Organization: FAI Materials Testing Laboratory
Thread-Index: Acsjw9Z3Sa/gQ/6mRcqfO5OsUt/HIwAYMr4Q
In-Reply-To: <20100714.191619.9965.1@webmail08.vgs.untd.com>
Cc: Classicrendezvous@bikelist.org
Subject: Re: [CR] Columbus SL "Competition" Tubing


I'm not a vintage weight weenie just for the fun of it. I have been thinking weight might be used to determine what tubing may or may not have actually been used in a given frame when it is not known for certain.

I would like to know the difference in weight between the 0.7/0.5/0.7 "Lightweight" Columbus SL" and the "Standard" 0.9/0.6/0.9 for the entire tubeset. Obviously there are other variables even for the same size frames like the type of lugs, amount of braising, amount of paint or internal coatings. I don't know if these variables are large enough to overcome the tube set differences, or not.

Brian or others, if you have otherwise identical complete sets, I would love to see what the full sets weigh. Thanks

Jon M. Crate Marietta, Georgia USA

-----Original Message----- From: classicrendezvous-bounces@bikelist.org [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of brianbaylis@juno.com Sent: Wednesday, July 14, 2010 10:16 PM To: verktyg@aol.com Cc: Classicrendezvous@bikelist.org Subject: Re: [CR] Columbus SL "Competition" Tubing

Chas.

That "SL Competition" you are talking about is actually Columbus KL tubing. It's the specs. you quote. I have a few of them in stock.

Brian Baylis
La Mesa, CA


---------- Original Message ----------
From: verktyg
To: Classicrendezvous@bikelist.org
Subject: [CR] Columbus SL "Competition" Tubing
Date: Wed, 14 Jul 2010 10:40:44 -0700


Has anyone heard of Columbus SL "Competition" tubing?

I have a slightly OT 1984 Gitane Team Pro frame (a "team replica" of those used by LeMond, Hinault and Fignon). It has Columbus decals in French.

The bike looks similar to this one:

http://www.gitaneusa.com/lemond.asp

The 1984 Gitane catalog specs list the tubing as Columbus SL "Competition". I haven't weighed the frame yet but it sure feels light and the tubes have the same kind of ping when tapped as Reynolds 753.

I've only seen 1 or 2 references to Columbus SL "Competition" and one list of tubing specs that has 2 different wall thickness dimensions for Columbus SL tubes.

Standard Columbus SL:

Top 09/06/0.9 Down 09/0.6/0.9 Seat 0.6/0.9 Head 1.0 Forks 0.9 Chain Stays 0.7 Seat Stays 0.7 Steerer 2.5/1.65

"Lightweight" Columbus SL"

Top 0.7/0.5/0.7 Down 0.7/0.5/0.7 Seat 0.5/0.7 Head 0.8 Forks 0.9 Chain stays 0.5 Seat stays 0.5 Steerer 2.5/1.65

Chas. 12 Gitanes Colerich
Oakland, CA USA