SAI & Included Angle

Steering Axis Inclination (SAI) is the inward or side to side tilt of the suspension strut top towards the centre of the vehicle, and in all cases is positive.

SAI is not altered in the aftermarket, only returned to the factory setting, perhaps following accident damage. SAI gives driver feel to the steering and assists in unwinding the steering after steering lock has been applied, bringing the steering back to being straight ahead.

The Included Angle is calculated by adding the SAI and Camber Angle together.