Strategy
Rally drivers avoid skidding on tarmac and concrete
surfaces, because it decreases cornering ability, and
increases tire wear. A key component of rallying is
reliability. When things go wrong at 110 miles per hour
going through the forest, they go very wrong. A tire blowout
is the last thing a driver wants.
Explanation
The static coefficient of friction is always larger that
the kinetic coefficient of friction. The frictional force
that moves cars is directly dependent on the magnitude of
the coefficient of friction between the tires and the road,
so the selection of appropriate tires, and the use of
exclusively the static coefficients of friction (not sliding
on tarmac) can maximize performance.
Exceptions
Sometimes drivers do not always maintain traction, and this
is due to track condition, surfaces, turning radii, and
sometimes they are just a result of driver error. For the
everyday driver, breaking traction is a very bad thing, but
professional World Rally drivers don't always see it that
way.