>>7881370It depends on which ones you're talking about.
MFB System was 4 pieces with a face, metal wheel, track, and bottom.
HWS(Hybrid Wheel System) added a fifth piece in the form of the clear wheel.
4D system could be as low as 3 pieces and as high as 7 pieces, depending on your combo.
The Zero G System beys were 5 pieces, but were backwards compatible with tracks and bottoms from the previous systems.
