[CR]Freewheel / Hub thread compatibility query

Hi everybody,

I have a question (or questions) about freewheel and hub thread compatibility. But before I ask I will say that I have read Sheldon's site below and looked at the chart here http://www.sheldonbrown.com/freewheels.html Now I have a vintage 70's hub that I believe has french threads although the hub isn't marked at all. I have taken a SunTour New Winner freewheel that I know is ISO threaded and I can very easily screw it on, and just as easily unscrew the freewheel from the hub. The freewheel threads on fully and is flush with the machined shoulder of the hub. Does my ability to thread on an ISO freewheel mean that the hub is also ISO or can components with ISO & French threads be mixed? And if so, does it matter which one is male and which is female? Looking at Sheldon's page the difference in measurement between threads is down fractions of a millimeter. I also tried a hub that I know has Italian threads (because it's marked as such, 35 x 24) with the same SunTour freewheel and while I can screw it on with little to no pressure it stops just short of threading on fully or to be flush with the hub shoulder. So this makes me think that even with such slight differences in thread pitch that sometimes "close enough" isn't close enough. So there is my question. Enlightenment needed, please and thank you.

Peter Schwar Montreal, Quebec

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