http://www.conti-tyres.co.uk/conticy...security.shtml

Continental, Germany tells us the Contact Security is

"Designed for industrial applications, the ContactSecurity can also
perform well in everyday use. Its massive puncture-proof breaker was
developed to resist metal cuttings and shards on factory grounds. In
view of its tough construction, it is not a comfortable touring tyre
with low rolling resistance, but it does effectively ward off gravel
and shards on short stretches in the city."

How do these compare for puncture protection, speed and mileage
against the Schwalbe Mararthon Plus ??

Thanks