The information I received from The Hunter Engineering rep is that "most" newer cars are hubcentric, with the implication that the hubcentric wheels are correctly centered on a balancing machine using cones through the center bore. He stated that for lugcentric wheels there are "fingers" that attach to the balancer that correctly center the wheel. My guess is that it frequently doesn't matter since the lug circle is usually very close to being concentric with the center bore, but there's no guarantee that they will always match up. The following is the address for a Hunter web page that locates a rep in your area: http://www.hunter.com/pub/company/findrep.htm. You might want to give him a call to verify the information. Thanks!!