Difficult & Tricky research

High performance tire shows bad alignment habit apparently compared with ordinal one, it's relatively easy to know the steering 2 positions on the steering column marks. One is for straight running and another is for the defined position by "Thrust Angle". This angle is formed by rear total toe vector direction and the centric of the automobile, so the bad habit is corrected to meet with latter steering position eliminating thrust angle to the ravel of zero degree as near as possible. Most of the drivers would not recognize the discrepancy because the driven car has some tendency to go relatively straight with the help of "Self Steer Effect" designed in frontal axle construction. Caster actions connected with tie rod through steering linkage, SAI(Steering Axis Inclination, same as King Pin Angle) are the main factors. Generally, self steer effect is observed when the car stops on a relatively flat ground surface, signal stopping phase for example, steering moves right and left repeatedly, this phenomena is mainly caused by thrust angle vector correction by self steer effect or requires steering action to specific direction, right or left depending on the thrust angle direction, plus or minus. And on the next phase of starting, steering action would be performed to opposite direction. This reversal steering action is caused by the changing of weighted points, anterior into hinter side. In another words, is your car is possible to stop without any assistance on steering wheel and to start straight without any touching on the steering? If there are a passenger's car driver, want I see him or her to say a great and maximum praise on earth! Because it is very difficult to establish "Zero Thrust" condition eliminating various errors in the wheel alignment and axle constructive geometry.
Also, we must remember the troublesome effect of dynamic weight distribution balance.