We're talking a very small change within the official 9/16" x 20 thread spec., right?
It must be an issue of fit classification; I've seen NOS NR crankarms where you could barely get an NOS NR pedal to thread in with greased threads and a pedal wrench.(Usually LH). I've actually chased the threads on an NOS arm or two. My guess is they were worried about LH pedals falling out due to under-tightening. Hey, Tullio's gang wasn't perfect, just pretty damn good in their timeframe. Keep in mind just when much of the stuff was designed...
Remember: one of the good things about Tullio was that he didn't often change his designs; however, one of the bad things was that he didn't often change his designs!!
Greg Parker
-------------Forwarded Message-----------------
From: Monkeyman, INTERNET:monkey37@bluemarble.net To: , INTERNET:classicrendezvous@bikelist.org Bicycle Classics inc, INTERNET:bikevint@tiac.net
Date: 4/12/01 8:48 PM
RE: Re: [CR]Campy 9/16 pedal threads changed in 1983!
>With all the fuss regarding pedal crank breakage, here is a wierd tidbit we
>just learned of that is sorta related to it. In 1983 or so Campy INCREASED
>the size of its pedal threads and also increased the diameter of the pedal
>hole in the crank. The argument was that it was done to make Campy similar
>to other cranks.
>Mike Kone
I'd heard something like that, but I'd actually heard they changed the "tooth" profile of the threads to a more rounded at some time. I don't know if the actual size of the hole changed or not. Keep us up to date.
enjoy, Brandon"monkeyman"Ives
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Nobody can do everything, but if everybody did something everything would get done. -Gil Scott Heron- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
_______________________________________________
----------------------- Internet Header --------------------------------
Sender: classicrendezvous-admin@bikelist.org
Received: from catfood.nt.phred.org (catfood.phred.org [216.39.149.190])
by spdmgaaf.compuserve.com (8.9.3/8.9.3/SUN-1.9) with ESMTP id UAA22069
for <gregparker1@compuserve.com>; Thu, 12 Apr 2001 20:48:04 -0400 (EDT)
Received: from phred.org ([216.39.149.189]) by catfood.nt.phred.org with Microsoft SMTPSVC(5.0.2195.2883);
Thu, 12 Apr 2001 17:42:52 -0700
Delivered-To: classicrendezvous@bikelist.org
Received: from catfood.nt.phred.org (catfood.phred.org [216.39.149.190])
by phred.org (Postfix) with ESMTP id 4C4C37591
for <classicrendezvous@bikelist.org>; Thu, 12 Apr 2001 17:45:57 -0700 (PDT)
Received: from bogart.umail.ucsb.edu ([128.111.125.65]) by catfood.nt.phred.org with Microsoft SMTPSVC(5.0.2195.2883);
Thu, 12 Apr 2001 17:42:21 -0700
Received: from fsh20088.resnet.ucsb.edu ([128.111.200.88])
by bogart.umail.ucsb.edu with esmtp (Exim 3.16 #4)
id 14nrim-0004mc-00; Thu, 12 Apr 2001 17:45:56 -0700
Message-Id: <l03130300b6fc096849b0@[128.111.200.88]>
In-Reply-To: <3.0.32.20010412051112.00705298@pop.tiac.net>
Mime-Version: 1.0
To: Bicycle Classics inc <bikevint@tiac.net>, classicrendezvous@bikelist.org
From: Monkeyman <monkey37@bluemarble.net>
Subject: Re: [CR]Campy 9/16 pedal threads changed in 1983!
X-OriginalArrivalTime: 13 Apr 2001 00:42:22.0093 (UTC) FILETIME=[99F4DBD0:01C0C3B2]
Content-Type: text/plain; charset="us-ascii"
Sender: classicrendezvous-admin@bikelist.org
Errors-To: classicrendezvous-admin@bikelist.org
X-BeenThere: classicrendezvous@bikelist.org
X-Mailman-Version: 2.0.1
Precedence: bulk
List-Help: <mailto:classicrendezvous-request@bikelist.org?subject=help>
List-Post: <mailto:classicrendezvous@bikelist.org>
List-Subscribe: <http://www.bikelist.org/mailman/listinfo/classicrendezvous>,
<mailto:classicrendezvous-request@bikelist.org?subject=subscribe>
List-Id: A sharing of vintage lightweight bicycle information and lore <classicrendezvous.bikelist.org>
List-Unsubscribe: <http://www.bikelist.org/mailman/listinfo/classicrendezvous>,
<mailto:classicrendezvous-request@bikelist.org?subject=unsubscribe>
List-Archive: http://www.bikelist.org/
Date: Thu, 12 Apr 2001 17:42:49 -0800