This angle is altered by tilting the steering knuckle pivot points backward or forward. Positive caster settings provide a greater degree of steering efforts, self-centered and stability to the vehicle. Therefore, nearly every car has a positive caster setting. A smaller positive caster settings makes for easier low-speed steering, but at high speeds, the vehicle will tend to wander. Camber is another suspension tuning measurement that affects vehicle performance.
Negative camber occurs when's the tops of the tire are leaning toward the vehicle.
Conversely, positive camber occurs when the tops of the tires are leaning away from the true vertical. The camber angle is adjusted to keep the outside tires flat on the ground during a turn. A car should ideally have no or zero camber on the outside tires during cornering, since it is these tires that bear most of the vehicle's weight and provide grip or traction. This is achieved by setting a negative static camber angle. How much negative camber to use is generally specified in your customer's vehicle specifications manual.