Dura Ace 10 mm pitch track chain

Finally, I succeeded to get a Shimano Dura Ace 10 mm pitch chain. Or two chains, actually.
One chain is slightly used and I bought it for a fair price via Marktplaats.nl. Unfortunately, this chain is a bit too short for the gear combination I'm planning (and the parts I have), but I got a few spare links from a nice chap in U.K.
The second chain is brand new and in the original box. I obtained it straight from Shimano's bike museum in Sakai, Japan.
The chain is the heart of the unique Dura Ace 10 mm pitch track series. Regular bike chains have a 1/2 inch (12.7 mm) pitch: the distance from pin to pin. The 10 mm pitch chain has a 10 mm pitch, of course.
The pictures below show the difference between a 10 mm pitch chain (top) and a regular 1/2" pitch chain (bottom).
Due to this special 10 mm pitch chain, all parts involved, as well as the tools, are different.
The distance from tooth to tooth of the chain rings and sprockets is also reduced from 12.7 to 10 mm and als the overall diameters have decreased. This requires crank arms with a smaller BCD (bolt circle diameter) and a rear hub with a smaller thread size.

Show of classic track bikes during european championships

On Sunday 20. October 2013 an exhibition of classic track racing bikes will take place in the Omnisport Centre in Apeldoorn, The Netherlands. This show will be a side event of the European Championships Track Cycling (18 - 20. October).
Owners, riders and other fans of track bikes produced before 1990 (roughly) are invited to join this event and to show their bikes to the audience. The bikes will be exhibited, knowledge and experience will be shared and, of course, there will be plenty time to enjoy the championships races.

During the break(s), experienced riders will be given the opportunity to ride some laps on the velodrome and to participate in a few races.

In the Omnisport Centre there are several restaurants, bars and counters to obtain all the food and drinks you'll need for the day.

Registration and information via
Facebook event page
e-mail: hofstedeharrie@gmail.com
Twitter: @hahofstede

More about this event on my special blog
or on Facebook