Toe-in is an adjustment of the front wheels where the distance from the center of the left wheel to the center of the right wheel is less at the front of the wheels than at the back of the wheels. This means that the front of the wheels are closer together than the rear of the wheels when viewed from above.
A slight amount of toe-in is usually specified to keep the front wheels running parallel on the road. This offsetting of forces helps to ensure stable and straight-line driving. The primary force counteracted by toe-in is the backward thrust of the road against the tire tread while the vehicle is moving forward. Other factors, such as play in the tie-rod assembly and variations in road conditions, also influence the need for toe-in adjustment.
Toe-in is measured in fractions of an inch or millimeters and is typically set according to manufacturer specifications to achieve optimal handling and tire wear.
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