What is thrust angle calculated using?

Thrust angle is calculated using the thrust line and the geometric center line. The thrust line is defined by the direction in which the rear axle points, which is essential for determining vehicle alignment and proper handling characteristics. The geometric center line represents the center of the vehicle's body. By comparing the thrust line to the geometric center line, technicians can determine if there is a misalignment that could lead to issues such as handling problems or uneven tire wear. This measurement is crucial in assessing the vehicle's alignment and ensuring that it functions properly on the road.

Other aspects in the choices, such as camber and SAI (Steering Axis Inclination), while related to vehicle suspension and steering, do not play a role in the calculation of the thrust angle itself. They are part of different alignment measurements and adjustment procedures. Thus, focusing on the relationship between the thrust line and the geometric center line is essential for understanding the concept of thrust angle.