Answer :
As long as the rear toe is movable, this is often done during a 4-wheel alignment. If the rear is fixed, the front toe must be set to account for the thrust angle in order to center the steering.
The front wheels' direction of travel can be predicted by the thrust angle. So, failing to consider this angle can compromise even the front suspension that has been precisely aligned. As the front wheels steer to align themselves with the intended direction of the vehicle, it may cause the steering wheel to become misaligned. Positive camber causes the outside suspension to raise on the wheel as the vehicle turns. The weight of the car bears down on the steering axis and aids in straightening the wheel as soon as it turns back to face front.
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