What does the front toe mean?

The toe-in of front wheels is to make the distance between the front ends of two front wheels of an automobile smaller than the distance between the rear ends. The difference between distances is called toe. Looking down from the top of the car, the left and right front wheels form an "eight" shape with backward openings.

The toes are inward, and the so-called "inner splayed feet" means that the left and right front wheels are inward respectively. The purpose of adopting this structure is to correct the outward rotation of the wheel caused by the camber angle of the front wheel. As mentioned earlier, steering wheel operation becomes easy due to camber angle.

On the other hand, because the wheels are inclined, the left and right front wheels rotate outward respectively. In order to correct this problem, if the left and right wheels have inward angles, plus or MINUS zero, the left and right wheels can keep moving in a straight line and reduce tire wear.

(1) The camber of the front wheel tends to steer the front wheel outward, and the toe-in of the front wheel tends to steer the wheel inward, which can offset the adverse effects caused by camber of the front wheel, make the wheel roll straight without side slip and drag, and reduce tire wear.

(2) The deformation of the hinge point of the suspension system also makes the front wheel valgus, which is also compensated by the toe-in of the front wheel.

The toe-in value of the front wheel is generally less than 8mm, which can be ensured by adjusting the length of the tie rod. The toe-in value of modern cars tends to decrease. When the camber of the front wheel is negative, the toe-in value is also negative, that is, it becomes the toe-in of the front wheel.