To compute longitudinal force, lateral force, and self-aligning torque in the contact coordinate system, the user must perform a test to determine the precise operation conditions.
The conditions of interest are:
•Case I:
•Case II: 
and
•Case III: 
and
: Lateral Tire Stiffness by Slip Angle
: Lateral Tire Stiffness by Camber
Angle
The lateral force 
can be decomposed into two
components: 
and 
. The two components are in the same
direction if 
and in opposite
direction if 
.