rubber compounds
Jeff Liebermann wrote:

See section under "Tread Compound": Markus
Hackmeyer, product manager at Schwalbe, feels
that hysteresis is a much more important
measure than durometer: "From our point of
view the compound hysteresis (also known as
viscoelastic properties) is much more
important than the durometer. That means the
durometer only can not define the compound
properties. That is the reason we do not
state the durometer values of our compounds."

OK, then what are the compound
hysteresis/viscoelastic properties then and how
can THEY be measured?

Shore Durometer, good idea. My HW store
catalogs don't have any but there is an
SI Durometer for some 50 bucks, obtainable thru
the web...

I take it is a small box that ejects a pin into
the material and when motion stops the required
power/distance is an indication of
material hardness?

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