21.   The shocks gave the car an aerodynamic advantage, but the cars often gouged the race track surface, and the bouncing left drivers in pain.

22.   The trainer intends to go first to inspect the track surface.

23.   The track surface was mud, heavy, thick, shin-deep mud.

24.   The track surface was so badly in need of repair that NASCAR refused to return until the pavement met its standards.

25.   Their jockeys blamed the track surface.

26.   Theoretically, accurate speed figures allow handicappers to compare horses who have raced at different distances, on different track surfaces and in different weather conditions.

27.   A worn track surface generally retains more rubber and gives the cars more traction.

28.   For example, the track surface from the Olympic Stadium will be moved to Clark Atlanta University after the games, Walker said.

29.   He wound up sitting backward just off the track surface.

30.   Hermans blamed a combination of a bonehard Mondo track surface and the extreme heat of Atlanta, Athens and Seville.