Re: [CR]Head tube/lug extensions.

(Example: Framebuilding:Tubing)

Date: Wed, 22 Mar 2006 15:41:27 -0800
From: "Kurt Sperry" <haxixe@gmail.com>
Subject: Re: [CR]Head tube/lug extensions.
Cc: classicrendezvous@bikelist.org
In-Reply-To: <5573677E5FEB83448AB3FC87DA7169340C3ADB20@MLSSWN05P.WAS.INT.IMF.ORG>
References: <5573677E5FEB83448AB3FC87DA7169340C3ADB20@MLSSWN05P.WAS.INT.IMF.ORG>


I've currently got my main on topic rider set up with the top of the bars a comfortable 2.5cm lower than the top of the middle of my saddle, this with about 5.25cm of the turned portion of an NR seatpost showing above the seatlug. There's about 5 or 6mm of rise between the top of the top tube an d the top of the headlug where they are nearest. I could easily bring them t o level and still have a safe insertion with the Cinelli 1A stem. I don't have a whole lot of standover clearance with the way I'm fitted on this frame, but I cannot recall once wishing I had more either honestly.

Does anyone here manage bars higher than or level with the saddle with a no n extended headtube and a standard quill stem?

Kurt Sperry Bellingham WA

On 3/22/06, Bingham, Wayne <WBINGHAM@imf.org> wrote:
>
> I resisted weighing in on the discussion when it devolved into lug
> design blogging, but the original talk about head tube extension
> prompted me to examine some of my own variations. I've never been
> particularly fond of the look of most of the extended designs, but when
> it is done well and blends into the overall look of the bike it can win
> me over. Besides, extensions can take many forms. Looking at an early
> 80's De Rosa, there is only about 3.5mm of extension on the lug. My
> Stan Pike with Prugnat lugs has 5mm of extension. The Baylis has 1cm,
> the Land Shark 1.5cm, and the Weigle 2cm. None of these bikes are set
> up with the bars level with the saddle. What's interesting is that I
> have set them all up within a small margin of each other. The Weigle,
> with it's lower BB and greater extension has the bars are 5.5cm below
> the top plane of the saddle, the closest saddle/bar measurement of them
> all. It's interesting how the rest in the comparison fall in. The
> Pike, a vintage early 80's set up, is 7.5cm. The Land Shark 8cm and the
> Baylis 8.5cm. My saddle-to-pedal measurement remains constant. This
> all sort of comes down to aesthetics and the look vs. the fit, but many
> factors come into play.
>
> I've posted some pix so you can all play along.
>
> http://www.wooljersey.com/gallery/HEADTUBES?page=1

>

> --

> fineartscrimshaw.com