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
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