Originally Posted by
Yoyo2012
I'm too facing the problem identifying the threading of my hub. My hub has no groove on the shell adjacent to freewheel. So it's either Italian or French threading. And what I found on the back of the freewheel cog is the stamping " France". I'd like to ask if there is any possibility French manufacturer ever produced Italian threading freewheel in history.Thanks.
I'm not aware of any French-made, Italian thread freewheels, but there are plenty of French-made English thread freewheels, and those will work on an Italian thread hub. FWIW, English thread Atom freewheels had a rectangular punch mark on the back of the body; metric thread bodies had no mark.
If you have an Italian thread hub with an English freewheel installed, the freewheel will have re-formed the threads to English, so if you have a known, English thread bottom bracket lockring you can use that to test for an English thread hub. If the hub is English thread, the lockring will fully hand-thread (no tools) on. If the hub is metric thread, it will only thread on for a partial turn before jamming.