Fidget spinner shiftknob (M12x1.25, M10x1.25)

Shiftknob I modeled which can take a 608zz bearing, just print this and whatever matching fidget spinner you can find (I used this one: https://www.printables.com/model/346220-fidget-spinner) that takes a 608zz bearing and you're good to go! Depending on how accurate your printer is you can use a drop of superglue on the inside of the bearing so the cap sticks to the shiftknob and locks the bearing in place.

Prints fine without supports, I suggest using outside and inside brims for the knob to ensure good bed adhesion.