[QUOTE=dbarnblatt@usa.]How can I tell what type of threading a hub I have has. I need a five speed freewheel for it but I'm not sure what to order. The hub is a Normandy low flange. But is there a way to tell on any hub? Thanks
On English threaded Atom and Normandy hubs, there will be a single groove between the freewheel threads and flange. If there is no groove it is French threading (unless Pierre had a little too much wine during lunch and forgot to cut the groove).
Originally Posted by Rabid Koala
I have a couple of Atom/Normandy freewheels that are difficult to thread on my Campy hubs. I assume they are Italian or English and I am trying to thread them on the opposite. Since they won't spin on easily I stop at the point of resistance. I used something else that will spin on easily. I understand French is another size altogether.
If there is a rectangular punch mark on the back of those Atom freewheels, they are English thread. If there is no mark, they are French threaded.
Campagnolo hubs may be marked with the thread size, but some older ones do not. OLder ones with a single groove cut between the freewheel threads and flange are English thread. If there is no marking or groove they could be either French or Italian and you should follow unwothy1's advice.