AERO
Short for aerodynamic. Aero adjustments on a racecar affect the behavior of the car in the speed range where the flow of air is fast enough to create down force on the tires.

ANGLE OF ATTACK
The angle of an aerodynamic device relative to the air stream. If not excessive, increases in angle of attack create more down force and drag.

APEX
The clipping point on the inside of a corner where the car is at the correct angle for a perfect exit onto the next section of track.

ASPECT RATIO
The relationship between a tire’s sidewall height and it’s tread width. Smaller aspect ratios describe a tire that is low profile and wide, verses tall and thin.