Ok so no you don't absolutly need to have a wheel that fits perfectly with the hub then, it would be extremely surprising that you would abuse your car enough to break a stud... I used to run wheels with a 1cm gap between the hub and the wheel on my offroad rig and I never broke anything in the trails, you won't see anything as harsh as what my rig did in your car... And it was russian steel which isn't any more solid then korean steel :P