Camber is the angle of the wheel and tyre from the vertical, when looking at the car from the front. If the tyre “points” in at the top that is known as negative camber and if it points out that is called positive camber.
Camber is built into vehicle suspension and geometry settings from manufacture and rarely has to be changed. Alteration is usually only necessary after an accident or damage to the vehicle’s suspension. Any checks or alterations should only be made or carried out by qualified personnel.
Excessive camber setting will result in accelerated wear to the shoulder of the tyre – outer shoulder if excessive positive camber is present, inner shoulder if excessive negative camber.
A relatively high negative camber setting is often used on racing cars so that the tyre will “bite” into the track surface during cornering.