We all know that bubba. And we all know that a 7.00-16 is taller than a 6.50-16 just as well as we all know the 7.50-16 is taller than the 7.00-16.
The original post asked:
I plead ignorant of what the first number means.
The first numbers (6.50 7.00 7.50) represent section width. However those three sizes also have a change in height (Known as section height which is not a component of the trade number) and my comment
It can cause a minor variance in the speedometer.
referred to this resultant increase in height that is not an apparent component of the trade sizing numbers.
Again you have simply intervened in this conversation to make bad light of my post without any respect for the other readers. You have again muddied the post and increased the potential for a misunderstanding for your own arrogance and personal self satisfaction.