if you put a set of wheels on your car and teh hub of the wheel is larger than the hub of your car (where the bolts fit but, their is a little space between the center of the wheel and the actual hub you place the wheel on) does it matter?

i heard i may need to get 'hub rings', i think theyre called. is this true? wouldnt the bolts be sturdy enough to keep the wheel in place without vibrations?