Wheels look great so far man. Your topology is a bit harsh at the moment though. Before adding all those loops, get the main shape down. If you add details in, plus edge loops, your model will have soooo much pinching going on.
Get shape down.
Add edge loops for turbosmoothing.
this is how many edgle loops I had:
I understand ur car has a lot of weird shapes, but dont look at those small details, like those weird slants in different areas. You can cut into your model later and add them.
Also, when you move verts, make sure you have either face or edge constraints on, so you dont destroy the topology/look of that area:
Keep at it man!