Re: [Classicrendezvous] Busted Genius

(Example: Events:Cirque du Cyclisme:2007)

From: "dave bohm" <davebohm@azstarnet.com>
To: "PeterGrenader" <peterg@ixpres.com>
Cc: <classicrendezvous@bikelist.org>
References: <20001017.082146.-156051.12.richardsachs@juno.com> <39EC5367.4AC46D55@penn.com> <00a301c038a8$481f0eb0$1801a8c0@normandassociates.com> <39EC946E.FCECF567@ixpres.com>
Subject: Re: [Classicrendezvous] Busted Genius
Date: Wed, 18 Oct 2000 07:37:28 -0700


Hi Peter,

Pretty wild huh! That is unusual but Genius was very light tubing and it could happen. An interesting trend has been happening at Columbus recently and that is that the tubesets have gotten heavier. For a while there they were making really light tube sets by the name of Genius and Nemo. Both of these tubesets use differential butting, which means it may have been butted in the vertical plane of the tube but not so on the horizontal plain. Nemo for instance was really light and only recommended for riders under 140lbs. When Foco cam out with its usual fanfare I noticed that it weighed 150 grams more than Nemo and even slightly more than Genius. They must have realized they had pushed the older material (Nivacrom) too far and insidiously added some heft. Sometimes I feel like I am the only one who noticed this little fact. Foco is a higher strength material than Nivacrom so maybe Ultra-foco won't be as unreliable as Nemo was but that is yet to be seen.

Sincerely,
David Bohm
Bohemian Bicycles


----- Original Message -----
From: PeterGrenader
To: Richard Rose
Cc: Jerry Moos


<Hilary.Stone@Tesco.net>; <mbikealive@earthlink.net>; <Classicrendezvous@bikelist.org> Sent: Tuesday, October 17, 2000 11:03 AM Subject: Re: [Classicrendezvous] Mexico vs Super (was: Colnago quality)


> Regarding latest steel offerings and people's rightful paranoia of wall
> thickness, I humbly submit the following knowning there are framebuilders
> amongst us:
>
> A couple of years ago, a woman racer I know had a 'not yet at high speed, not
> a prime or bell lap' women's senior cat 4 crash in a local crit. She tee boned
> another who had laid her bike down before her. My friend was on a steel Coppi
> made of Columbus Genius tubing. Not only did the frame fail, but the front end
> actually separated from the rest of the bike right at the top/down tube butts.
> Kinda weird considering they were going relatively slow.
>
> On closer expection, I realized that the top tube wall thickness of the Genius
> was so thin you could peel the edges with your fingers like a coke can. That
> got me right in the 'stary as hell' bone.
>
> respectfully submitted,
>
> Peeeeeeter
> (Santa Monica)