AMuzi wrote:

Cheaper than a separate chain adjuster but
the same effect:
http://www.yellowjersey.org/GCDL5.JPG

It is difficult to see what happens there...?

Here is another way:

https://cdn.gasbike.net/images_templ...ioner-demo.jpg

Which I once saw on a tandem bike. There was
a small chainwheel in between that one could
adjust vertically to set the chain tension.

--
underground experts united
http://user.it.uu.se/~embe8573