[CR]Track Hub Dura Ace 10 pitch

(Example: Framebuilders:Doug Fattic)

Date: Fri, 21 Jan 2005 02:04:41 +0100
From: <"mg@formlos.ch">
To: classicrendezvous <classicrendezvous@bikelist.org>
Subject: [CR]Track Hub Dura Ace 10 pitch

I recently bought a very nice dura ace HF track hub on ebay. when i got it i wondered why i couldn't fit custom 1"37 track sprockets on it. even my local bikeshop couldn't help. it has a stepped thread of 33x1 mm for the cog and 32x1 (left thread) for the lockring. i finally remembered shimanos revolutionary 10 pitch system launched in the 80s and found it in a old shimano catalog. the idea of10 pitch was obviously saving weight by smaller dimensions (10 mm chain links instead of 1/2"). it didn't survive for long since it was subsequently banned by UCI for racing. shimanos dating code says "CI" which stands for september 78. i didn't know they date back so far? i thought it came up only 81 or 82? so i don't know what to do with this barely used hub (32 holes, only rear). i am not collecting parts and without the rest of the 10 pitch group i can't use it. anyone interested in the hub? or someone willing to sell me a matching group (crankset and cogs)? i might build up a 10 pitch track bike (if interested please contact me offlist)! pictures at http://www.formlos.ch/velo/track/DA10P_1.JPG http://www.formlos.ch/velo/track/DA10P_2.JPG

martin glaettli
winterthur, now stormy switzerland