The turning radius is the turning angle of the left and right front wheels during cornering. Giving the left and right different turning angles matches the centers of turning for all four wheels and increases the driving stability during cornering. For example, in the type of steering system in which the tie rods are located behind the spindles, if the left and right knuckle arms are mounted so as to be parallel with respect to the vehicle’s center line, the left and right steering angles will be equal (