See http://www.sheldonbrown.com/fixed.html#chain for a short blurb. I ended up with on of the cogs a few years back.
Steven M. Johnson, Chesapeake, VA http://www.geocities.com/azubris/history2.html "Alison Gross, she's the meanest witch in the North country."
On Tue, 30 Apr 2002 16:20:23 -0700 (PDT) scott davis
> I recently cancelled another auction for Shimano 10
> Dura Ace track hubs. I guess they are 70s or early
> 80s vintage. I thought they were standard track hubs,
> so I cancelled the auction when I got an e-mail
> claiming this:
> These Shimano track hubs are from a 10 millimeter
> pitch group. The hubs are threaded for a 10mm cog. A
> standard track cog will not fit so these hubs are
> useless to anyone that does not have a 10mm cog, chain
> and crank/chainring.
> Any body out there able to confirm or repute above??
> Here's the Link:
> Scott in StPaul MN