Certain drivers prefer certain types of tracks

Week-to-week and race-to-race, different variables present new challenges to Nextel Cup races when the circuit travels to a different track. Even a site that has two races in one season can have changes from the previous event because of different weather conditions.

Updated: September 10, 2007, 4:24 PM ET
By Bill Borden | Special to ESPN.com

Most professional sports -- basketball, football, hockey and tennis -- have tightly regulated specifications as to the size of the playing field and the type of surface that is to be used for their competitions.

A pro basketball player, for example, knows that when he bounces a basketball made to a specified weight with a specified air pressure on a floor that is to have a specified amount of flex that he can expect the same result in Boston as in Miami or Houston or Los Angeles.

The ...

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