AMuzi wrote:

The guy who only stocks one model chain knows
a lot more than the guy who made it?

http://bike.shimano.com/content/saus...s/cn-hg40.html

.... what do you mean? What I can see your link
say the same:

Cassette Compatibility 6/7/8-speed

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