Rims with odd or even number of holes ?

What is the influence of the odd/event number of holes in the rims of a car ? The weight at the center of the wheel is *not* constant (depending of the position/radius/number of holes, see red curve below), so what is the "best" solution (i.e. that would unbalance the less possible the wheels) ? Try to reduce gap average (green line) : tune both number of holes and hole size to see results...

Nb holes : 6
Hole diam : 40
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