Question

explain about PCD and BMI

Answer 1

PCD: Pitch circle diameter is the diameter of the circle which passes through the centre of all the studs,wheel bolts or wheel rim holes. The easiest way to calculate PCD is as follows is; Measure the diatance between the adjacent studs from centre of each hole.
BMI: Body mass index. Body mass index is defined as the ratio of the body mass to the square of body weigth. Units of body mass index is kg/m2,which the units of mass is kg and the units of the heigth is metre.