Re: [CR]Information Please: Campagnolo High Flange thread pitch grooves

(Example: Framebuilders:Tony Beek)

Date: Fri, 5 Dec 2008 14:03:53 -0800 (PST)
From: "bruce thomson" <masi3v4me@yahoo.com>
Subject: Re: [CR]Information Please: Campagnolo High Flange thread pitch grooves
To: Classicrendezvous@bikelist.org, john@os2.dhs.org
In-Reply-To: <493440EE.1030805@new.rr.com>
cc: rapidfire10ring@hotmail.com


John:  Please don't misinterpret this as an ungrateful reply.  I am not completely satisfied with your answer, (no its not you), but I think you a nswer is incomplete.  I believe you when you say that the thickness or ou tside diameter of the the threads is distinguishable but when I measure two of my rear hubs, both are 35mm, including the one with the "groove".  Th erefore, I have two hubs with the same thread OD and differing thread pitch es,    I know I saw this information somewhere at an earlier time. 

Bruce Thomson Spokane WA 99204 (509) 747 4314 Masi3v4me@yahoo.com      rapidfire10ring@hotmail.com


--- On Mon, 12/1/08, John Thompson wrote:


John Thompson wrote:
> bruce thomson wrote:
>
>> My small flange hubs have the thread pitch stamped between the end of the f
>> reewheel threads and the flanges. My High Flange hubs do not. But on some there are grooves. No groove meand ??, one groove means??, and two gr ooves mean ?? I saw this information at least one time earlier and now cannot f ind it. If anyone has the answers AND a source please reply.
>
> Your large flange hubs are older than your small flange ones; Campy only started printing the thread pitch in the early 80's IIRC. A single groove o n an older Campy hub indicates English threading. 2 grooves is French, no gro oves is Italian.

Whoops! My mistake; Campy only marked English threading; French and Italian are unmarked but readily distinguished by the 1mm difference in diameter (35mm=French, 36mm=Italian). An Italian freewheel will not engage a Fre nch thread hub at all, and a French freewheel is to small to even start on an Italian thread hub.

--
-John Thompson (john@os2.dhs.org)
Appleton WI USA