For 1990-2009 cars

Camber is the tilting of the front tires and wheels (1) from the vertical (2) as viewed from the front of the vehicle. When the tires and wheels tilt outward (1) at the top, the camber is positive (+). When the tires and wheels tilt inward at the top, the camber is negative (-). The amount of the tilt is measured in degrees from the vertical and is called the camber angle. The camber setting influences directional control and tire wear.

When the tires and the wheels are set to a positive camber angle (1), they will tend to roll in a path that is away from the vehicle's true path. The effect of each tire and wheel tends to cancel the other. The suspension geometry and the camber setting are designed to keep the tire tread surface perpendicular (flat) on the road through the full range of suspension travel.