What is Toe In / Toe Out?
Toe In / Toe Out describes the angle of the front (or rear) tires when viewed from above. If the front of the tires angles in (or towards the chassis), that is Toe In. If the front of the tires angles out (or away from the chassis), that is Toe Out.
Tuning with Toe In / Toe Out
Toe In / Toe Out can be adjusted to increase or decrease steering and steering response. You adjust Toe In / Toe Out by turning the turnbuckles attached to the steering knuckles or hub carriers.
Adding Toe In will decrease steering into a corner, but add steering out of a corner during acceleration. Toe In will also stabilize the car under acceleration. Toe Out will increase steering into a corner, but cause the car to wander a little on the straights and in bumpy sections. It is not normally suggested that you use more than 1deg of Toe In or Toe Out.
More Toe In results in less on-power steering and slightly more entering a corner. Less Toe In results in more on-power steering and slightly less entering a corner. Less Toe In will also increase staightaway speed, as the rear tires will scrub less.
On the rear, there will always be Toe In or 0deg of Toe. You will never use Toe Out in the rear. On most cars, a Toe Block designates the degree of Toe, while others have turnbuckles to adjust (similar to the front). To change rear Toe, either adjust the turnbuckles or remove the Toe block and replace with another block.