The intentional nonparallel orientation of opposite wheels. Toe-in is measured by subtracting the distance between the front edges of a pair of tires from the distance between the rear edges of the same pair of tires. The toe-in dimension is positive when the fronts of the tires are turned toward the center of the car.
Difference in distance between the front of a pair of wheel rims and the rear of the same rims, the front distance being less.
when the wheels (front or rear set) are not parallel to each other, but facing inwards ( top view: / \ ); for adjusting the car's handling.