Hi AquariuZ !
So,you see "an unbalanced wheel with pendulum"...
My purpose was to show, a lever (a bar...) not a wheel (circular frame arrangement...).
Thus and so, you can name it a "minimal" wheel,with two spokes,only.Anyway...
For stability,the gravity checks the relative position of CoG and fulcrum,nothing more :they must be on the same vertical line...if not,we have instability,the fall.
Now,if it seems that this model, is "sophisticated" (to understand or to test...),I can take it as a challenge,a venture to a new simplification...maybe as a "kindergarten" toy.Who knows?Maybe...
All the Bests! / Alex