Micro,
The axles are not transferable, the tires are not meant to be transfreable, but they can be transfered. The tires need a bit of stretching to go over the standard bit rims. Some guys have swapped standard bit rims with pullbacks , the smaller wheels lower the bit, and the wider rims also makes the bit harder to flip (from what I've read).
If your going to swap tires, be sure to remove the tires when not in use, i left em on, and now one tire has split

, but only after like 2 months stretched over the bit rims. Guess i just have to get me a new pullback