Re: [CR] WAS measuring chainstay length NOW stand-over heigth

(Example: Framebuilding)

Date: Thu, 12 Aug 2004 15:27:00 -0700 (PDT)
From: "Joe Starck" <josephbstarck@yahoo.com>
Subject: Re: [CR] WAS measuring chainstay length NOW stand-over heigth
To: classicrendezvous@bikelist.org
In-Reply-To: <20040812.125813.3928.25.richardsachs@juno.com>


David Cowie asked,

"Does anyone measure the seat tube length using a vertical line from the ground?"

David,

If they do -- they call it stand-over heigth.

Starck Joe
Boojum Summumbonum Bicycles
Madison, WI


--- Richard M Sachs wrote:


> negative.
> i measure the virtual centreline* of the seatube,
> regardless of its inclination.
> e-RICHIE
> chester, ct
>
> * i spelled it he British way to show that i have
> learnin'.
>
> On Thu, 12 Aug 2004 09:52:20 -0700 David Cowie
> <recycle@wmni.net> writes:
> > Hello list, I have followed the thread and It
> seems that the only way
> > to
> > prevent variables (tire size, headset stack
> ect.)in measurement is
> > to
> > measure from the bb center line to theoretic axle
> possition.
> > Measured
> > along frame centerline.
> > Doe's anyone measure the seat tube length using a
> vertical line from
> > the
> > ground?
> >
> > David Cowie
> > Sutherlin, Oregon
> > 95ยบ
> >
> >
> > Richard M Sachs wrote:
> >
> > > postscript to prev reply...
> > > how different is this issue from when angles are
> speced
> > > and then folks 1)switch forks or headsets or 2)
> have unequal
> > > tire types and air pressures front to back.
> these would skew
> > > any angles from their blueprinted numbers.
> what's the point
> > > of measuring an intersection between the top and
> seat tube
> > > if you can't guaranty the frame is level?
> > > blueprinted chainstay specs don't have to equal
> the results
> > > you get with your tapemeasure on your assembled
> bicycle.
> > > e-RICHIE
> > > chester, ct
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