XRAY - Model racing cars

what is the value means?
offset?

thanks~

This indicates the shims placed in front of the arm on the inner hinge pin.

You have circled the wheelbase shims. The wheelbase shims will set the wheelbase of the car (distance between front and rear wheel axles - for more details on wheelbase ready the set-up book). The shims in the set-up sheet indicate how many shims (in which thickness) you use front and rear. The set-up sheet will then automatically calculate your wheelbase. And the indication shows the position of the shim in front of the arm, which means the remaining amount of the shims are used behind the arm. Please check the instruction manual where it is shown how many shims you need to place in basic set-up in front of the arm and the remaining shims behind the arm.

Wheelbase setting

The 0/1/2 numbers indicate shim sizes in mm's.

I take it as the front/rear wheelbase setting is showing the amount/ size of shims in front of the arms. The difference would be added to the rear of the arms to fill the gap.