Seems that u are very fond about the 'defective' , or rather 'tilted', or 'biased' wheel?
Then how are u detect a defective wheel???
The popular ways, are, slicing the wheel into six sections,[ ignore the green], [or six stars numbers, and ignore the the green]...and then see how the section, or sections, that keep being hit, after a certain amount of spins.
How to slice the wheel into six section, on say, euro wheel.
1]count clockwise, from zero, 1,2,3,4,5,6,, that 1st section, [or simply 'section A']
then 1,2,3,4,5,6, again, that section B, and so on, till whole 36numbers spliced into six sections, of ABCDEF.
Thus after a certain amount of spins, you could see, which section, will have more hit, then the others.
And you may see that...
1]Wheel are balanced, which mean the sections will have almost equal hits after a long spins.
2]A particular section, or 2, or 3 sections, will have more hits than the others...
And u act or bet accordingly...