Randy, that means that the B axis mentioned in the workshop manual is located at the inner border of the cmplete wheel and the A axis is located at the outer border of the wheel? In consequence, the distance (back to fromt) between A axis and B axis is the diameter of the complete wheel, isn't it? Hence the 1/8 to 1/16 difference between A and B is relativ to the diameter of the complete wheel and not the diameter of the rims?
If this is true Geometry will help me to calculate the angle I am looking for
Volker