Testing tires is a difficult job (and probably the reason we
haven’t conducted such a test since 1989). But tires are a most
critical part of your car, your only connection to the road.
There are many difficult-to-control variables that affect tire performance and make accurate testing a challenge. For one,
the temperature of the track surface, which can have a significant effect on how a tire performs, can vary widely over the
course of a day.