Try not specifying the axis point you point in the p3d. Just leave it blank, then it should base the axis on the center most point of the selection.
example:
class TireRR: WheelSpin {
selection = "pravy zadni";
axis="";
};
My understanding is when you left it blank it means "self" so the very center of your "pravy zadni" wheel.
If your model is not symmetrical it will still look a bit rough, but that's a modelling issue not config.
Good luck.