As part of my Raleigh Gran Sport rebuild I'm looking for campy hubs. I notice a fair few of them on ebay have Italian threading. If I bought one of these would I be able to get a corresponding 6 speed freewheel easily (and cheaply!) or should I limit myself to english threading?
An Italian freewheel thread has the same pitch as BSC, but is 0.2mm larger in diameter. If you don't mind using a little force, a BSC freewheel will go onto an Italian hub, modifying the thread as it goes. You then have a BSC hub. A little brutal perhaps, but it works. Many older Italian hubs sold in the UK will have been used with BSC freewheels at some point in their life - often in ignorance.
It's obviously nicer to keep everything matching, but unless the hub is NOS it's just as safe - and maybe safer - to go with a BSC freewheel.
Calmes dans le demi-jour
Que les branches hautes font,
Pénétrons bien notre amour
De ce silence profond.