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No, because the GT2 pulley is wide around 13mm, the two original bearings are 10mm if positioned together.
Furthermore the diameter of the Gt2 pulley is different than the one of the bearings. In this case (different than the one of the X axis) if you watch the motor bracket for the Y axis, you can see that also there Creality places a couple of bearing for guide the pulley over the V-Slot Profile.