Cool
I think misty might be onto something, and if it's true, we might have to re-write some of the prevailing wisdom about grip sizes. But just thinking out loud here:
1. There is the thickness of the OG, then there is the thickness of the OG when it is stretched (the 5% thinner idea sounds reasonable), but don't you have to figure in the overlap somehow? Andy Murray prefers what is called "
flat wrap". His overgrips don't overlap at all. But for most everybody else, the OG is overlapping by 1/4 to 1/2 of the total width, so it's twice as thick in those spots. Joe wraps with a 1/4 overlap, Pete wraps with half the width overlapping. Pete's grip will feel bigger, so I don't know how you account for this variation in a math equation designed to predict such things?
2. I've handled the
heat shrink sleeves which are manufactured and marketed as building the grip up exactly 1 size. I dunno, just going by feel and look, very unscientifically speaking here, these sure seem thicker than one or even two layers of overgrip. Misty's theory poses the idea that a 0.60mm OG adds
more than one grip size (1.3 sizes actually) If I had a nice set of digital calipers, I'd look at the thickness of those sleeves as a baseline reference/confirmation point. It's plausible that the heat shrink sleeves
don't really add exactly 1 grip size (1/8"). But until proven otherwise, that's probably a good baseline and should prove useful for figuring this out in a non-math, reverse engineering sort of way. I used to bring my drafting tools to geometry class, which drove my teacher crazy, but taking measurements often helped me to understand and confirm equations, theories, and theorems. I find myself wanting to do the same thing here.
-J