http://www.miata.net/garage/hubcentric.html
There's a great simple right up on hubcentric vs lugcentric.
I guess some wheels, and some vehicles can work lugcentric (relying on the lugs to center the wheel)
I think most people on this site are running in this orientation because everyone has been posting they have a 108mm bore wheel.
I'll probably order a set of rings, just to make sure there are no vibrations, but I'm not sure if there are rings to make a 100mm to 108mm.
Hopefully they just work out
Also some wheels are designed to be lugcentric, so they wouldn't rely on the hub to be centered anyway.
And if your vehicle has 6 lugs which utilize conical seat lug nuts. They will always be lugcentric. (are we this way? I've never pulled a tire)
Found the rings: http://www.justforwheels.com/index.jsp?cat=hubcentric
When I get my wheels I'll confirm the exact size of both wheel and hub, and then order some rings.
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