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

(Example: Framebuilders:Brian Baylis)

Date: Mon, 1 Dec 2008 13:32:26 -0800 (PST)
From: Jerome & Elizabeth Moos <>
Subject: Re: [CR]Information Please: Campagnolo High Flange thread pitch grooves
In-Reply-To: <>

Well my experience is different.  I find an Italian or English FW will en gage a French hub.  It will be loose, anywhere from obviously loose to ju st a little loose depending on the particular FW and hub.  A French FW wi ll, in may experience alway start on an English or Italian hub, and will us ually go maybe three turns before it really starts to tighten up.  It wou ld usually be possible to run a French FW all the way onto an Italian hub u sing an FW tool and a wrench if one were foolish enough to do so.


Jerry Moos
Big Spring, Texas, USA

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

From: John Thompson <> Subject: Re: [CR]Information Please: Campagnolo High Flange thread pitch gr ooves To: Cc: Date: Monday, December 1, 2008, 1:54 PM

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 grooves mean ?? I saw this information at least one time earlier
>> and now cannot find 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 on an older Campy hub indicates English threading. 2 grooves is
> French, no grooves 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 French thread hub at all, and a French freewheel is to small to even start on an Italian thread hub.


-John Thompson (
Appleton WI USA