What is the optimal toe-in adjustment in millimeters?

[JohnLee]

Generally, a toe-in adjustment of about 5 millimeters is optimal. The normal range for toe-in in most vehicles is between 0-8 millimeters, so a 3-millimeter toe-in is not excessive and falls within the normal range. However, the specific toe-in setting should always follow the manufacturer's recommended specifications to ensure it stays within the proper range. More details are as follows: Introduction 1: Due to wheel camber, the left and right wheels often generate opposing lateral thrust forces corresponding to the camber angle, which increases tire wear. Introduction 2: To counteract this effect, the lateral thrust must be eliminated. This is achieved by installing the front wheels so that their center planes are not parallel—the distance between the front edges of the wheels is slightly less than the distance between the rear edges. The difference between these distances is known as the toe-in.