michelin has some "splaining" to do

I measured the sidewall width and the old Goodyears were 9-1/4"wide, new Michelins 9" wide. Both sets of wheels are KelseyHayes 16"x7" steel cop car rims, so that is a constant. Interestingly, I have a set of old Michelin AquaTreds? (or equivalent), mounted on another cop car, and they have similar measurements, but "LOOK" much wider, and more aggressive because of the tread design, I guess.