Front wheels alignment. As a result of replacing the ball pins, the correct alignment of the front wheels may be misaligned. This dysregulation may also occur during the normal operation of the car, as a result of settling and aging of the rubber elements of the suspension arms of the front wheels. A symptom of improper alignment of the front wheels is uneven tire tread wear. The reason for this may also be the incorrect alignment of the axle of the steering knuckles. Whenever excessive wear is found on the tires of the front wheels, the toe-in and camber of these wheels should be checked.