Wheel Alignment Angles: Caster

Fig 1: Identifying Caster Angle

Courtesy of FORD MOTOR CO.

ITEMS DESCRIPTION CHART

Item	Description
1	True vertical
2	Positive caster angle
3	Shock centerline
4	Pivot centerline

Caster is the deviation from vertical of an imaginary line drawn through the ball joints when viewed from the side. The caster specifications in this information will give the vehicle the best directional stability characteristics when loaded and driven. The caster setting is not related to tire wear.