Re: [CR]Lugless brazed question with stretched head tube


To: jac33@tron.arts.cornell.edu
Cc: classicrendezvous@bikelist.org
Date: Sun, 22 Jul 2001 21:34:59 -0400
Subject: Re: [CR]Lugless brazed question with stretched head tube
From: tomwitkop@juno.com


20 years ago a friend of mine had a lug less Hurlow. He replaced the standard British no name headset with a Campagnolo. He pounded in the head race and stretched the head tube. The steel is not torn but is very slightly bulged-is there a clever way to reduce the bulged? I believe the problem is only cosmetic and not structural. Thank you very much. Thomas Witkop Rockville, Maryland PS-the bicycle is still working and the frame has not failed-that is at least some anecdotal evidence of the strength of filet brazing. On Wed, 18 Jul 2001 11:28:18 -0500 (CDT) Jonathan Cowden <jac33@tron.arts.cornell.edu> writes:
> Circa a decade ago I read an article in Bicyling or Bicycling
> Magazine
> (can't remember which) on the comparative advantages of lugged and
> lugless construction. Dave Tesch built up a couple of road bikes up
> for
> this test. Much to my surprise, the fillet brazed bike actually had
> less
> deflection at the bottom bracket than the lugged bike; it was
> slightly
> heavier. None of the differences measured were such that the riders
> could
> discern them. Jon
>
> Jon Cowden
> Ithaca, NY
>
> On Wed, 18 Jul 2001 rfitzger@emeraldis.com wrote:
>
> > O fellow classicists,
> >
> > Here's a wierd question, as I work with a ride buddy -
> traditionally, are
> > lugless brazed frames considered as strong as lugged ones? I
> would think they
> > would be equivalent in strength, but the rider in question is over
> 200 lbs.,
> > and he'd be happier knowing the bike he is looking at would hold
> up well under
> > him.
> >
> > Thanks
> > Russ Fitzgerald
> > rfitzger@emeraldis.com
> >
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