Turning angle also referred to as toe-out on turns, describes the difference in side to side steer angles of the front wheels as the vehicle turns. Created by the angle of the steering arms, turning angle allows the outside wheel on a turn to steer at a lesser angle than the inner wheel. This is necessary because the outer wheel has to travel a larger radius, otherwise the tires may scuff when the vehicle turns. If a steering arm is bent turning angle will change. Large turning angle errors may lead to irregular shoulder wear on the front tires.
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