Re: [CR]Freewheel threads on hubs...when did they start telling us what the threading was?

In-Reply-To: <45BC1D7B.7030608@os2.dhs.org>
References: <002201c741b2$4970c5a0$b0f0d045@ts>
Date: Sat, 27 Jan 2007 23:28:52 -0500
To: john@os2.dhs.org, classicrendezvous@bikelist.org
From: "Sheldon Brown" <CaptBike@sheldonbrown.com>
Subject: Re: [CR]Freewheel threads on hubs...when did they start telling us what the threading was?

John Thompson wrote:
>
>Older English thread Campy hubs were marked with a single groove on the
>hub shoulder (where later versions stamped the thread specification):
>
> http://www.os2.dhs.org/~john/old-english-campy.jpg
>
>Italian and French were both unmarked, but readily distinguished by the
>difference in diameter (36mm for Italian; 35mm for French).

You were doing fine until the parenthesis...You're getting confused with bottom brackets. Italian freewheel threads were 35 mm x 24 tpi (Ital BBs are 36 mm.) This is so close to English/ISO as to be interchangeable as a "class b fit."

French is significantly smaller, 34.7 mm and has a finer pitch (1 mm.)

See: http://sheldonbrown.com/gloss_e-f.html#freewheel

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