On 9/8/2017 11:46 PM, Emanuel Berg wrote:
John B. wrote:

"well, we do still have a few 9 speed chains
left".

Anyone feel free to elaborate on this. How and
why should the chain be different with
different cassette/chainring configurations?

And is there a "notation" do describe this?
Usually makes it easier to understand...


Overall width.
4/5 speed systems used very wide chain as you may recall.
To get 8, 9, 10, 11 sprockets inside the 130mm road format
(originally seven speeds) the sprockets are closer and so
the chain is smaller.

http://www.yellowjersey.org/photosfr...t/MANYCHAN.JPG

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971