Re: [CR]Re: frame longevity vs. stiffness

(Example: Framebuilders:Tubing:Columbus)

Date: Mon, 01 Jul 2002 15:58:37 -0700
From: "Chuck Schmidt" <chuckschmidt@earthlink.net>
To: classicrendezvous@bikelist.org
Subject: Re: [CR]Re: frame longevity vs. stiffness
References: <23.2084301b.2a523651@aol.com>


RaleighPro531@aol.com wrote:
>
> In a message dated 7/1/2002 6:38:41 PM Eastern Daylight Time, GPVB1@cs.com
> writes:
>
> > What exactly are "soft joints?" What do you think yields when you cold set a
> >
> > lugged steel frame? It's not the joints, it's the tubing (it's bending, or
> > worse, buckling in some cases).
> >
> > Joints on a lugged steel frame do not move after a frame is built, unless
> > they pull apart due to improper brazing. That's a failure.
> >
> > You are correct in saying that stiffer frames are stiffer....
> >
> >
>
> If your saying that there is no movement between a tube and lug that are
> properly joined, I would be inclined to agree.
> Is it not possible for an overly thinned lug to flex?
> Would this not cause the frame to feel less rigid?.........didn't want to say
> soft ; )
>
> Pete Geurds
> Douglassville, PA

Pete, if you carefully stripped away the lugs from a finished frame, the tubes would still be joined together with brazing material. On a properly made frame the tubes are mitered together to very close tolerance. There are not gaps between the tubes that the lugs have to span. The purpose of lugs is not to make the bike less flexy.

Chuck Schmidt
SoPas, SoCal