Originally Posted by
ZappCatt
The thread issue that you are talking about is mixing between ISO, British and Italian threading. If you stick with one threading, even between brands, you should be fine...
Originally Posted by Baxtefer
Type Thread Equivalent
I.S.O. 1.375" x 24 tpi 34.92 x 1.048 mm
British 1.370" x 24 tpi 34.80 x 1.058 mm
French 34.7 x 1 mm 1.366" x 25.4 tpi
Italian 35 mm x 24 tpi 1.378" x 1.058 mm
and
ISO, English and Italian are all semi-interchangeable, but it you shouldn't go back and forth between different types of freewheels on the same hub repeatedly
Originally Posted by
Ken Cox
I have heard/read that one should pick one cog manufacturer or the other, and not mix them on the hub, because their threads differ slightly from each other and switching back and forth shortens the life of the hub's threads.
On my Bianchi Pista, with the stock Sugino RD crank, the EAI cog, with the flange against the hub, gives me the best chainline.