Steering Axis Inclination (S.A.I.)

Fig 1: S.A.I. And I.A.

Courtesy of CHRYSLER GROUP, LLC

Steering axis inclination (1) is the angle between a true vertical line starting at the center of the tire at the road contact point and a line drawn through the center of the upper ball joint (or strut) and the lower ball joint. S.A.I. is built into the vehicle and is not an adjustable angle. If S.A.I. is not within specifications, a bent or damaged suspension component may be the cause.