Checking Front Toe Angle

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Fig 1: Checking That Instruments Are Adjusted In Relation To Each Other On Front And Rear Axles

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check that the instruments are calibrated to each other on the front and rear axles. This is very important so that the front toe angle can be adjusted in relation to the thrust line of the car (geometric driving axis). The thrust line is the line formed when the rear wheel toe angles are divided equally, see illustration.

The difference between the symmetry line of the wheels and the thrust line is called the thrust angle. The thrust angle must not deviate by more than a maximum of 0° 0.25° from the symmetry line of the wheels.

NOTE:

The differences in the diagram are heavily exaggerated in order to illustrate the differences.

Check

the symmetry line of the wheels
the thrust line
the thrust angle.

Fig 2: Checking Symmetry Line Of Wheels, Thrust Line, And Thrust Angle

Courtesy of VOLVO CARS OF NORTH AMERICA.