I wanted to add some background to the full discussion on wheel swaps using wheels with different stud patterns and hub center bore/register dimensions.
Some years back I discovered that there was a rotor that was common to 2 distinctly different GM platforms--one RWD and the other FWD. After understanding the how & why, it was easy to accept, but it was quite confusing initially.
Considering that brake rotors are not centered by the wheel studs, this then raises the question of how it could be OK to have wheels centered by the studs, when we look at the differences in OE wheel center bores between Corvette and Zeta cars (70.3 - 70.5 vs 67.4). Production "fit" is not as tight as is possible to achieve with aftermarket centering rings, and most OE tapered-seat wheels are considered to be a combination of hub-centric (to roughly center wheels with studs) and lug-centric (to bring the wheel into a concentric condition) on the hub.
Here's the rotor info:
Centric front rotor PN 12562055 -
http://www.rockauto.com/en/moreinfo.php ... 76&jsn=490" onclick="window.open(this.href);return false;
Buyer's Guide info:
CHEVROLET CAMARO 1998-2002 - 120.65mm stud pattern (F-body)
CHEVROLET IMPALA 2000-2005 - 115mm stud pattern (W platform)
2.78" advertised rotor ID to center rotor on hub = 70.6mm, which is larger than the 4.75" wheel/hub size. This is common on both hubs:
Hub info for Camaro & Impala:
Camaro -
http://www.rockauto.com/en/moreinfo.php ... 76&jsn=516" onclick="window.open(this.href);return false;
wheel pilot: 2.76 = 70.1mm
Impala -
http://www.rockauto.com/en/moreinfo.php ... 95&jsn=632" onclick="window.open(this.href);return false;
wheel pilot: 70.1mm
Parts commonality (providing service parts inventory reduction) was the clear goal - so a common hub register dimension was essential. The accommodation of the different wheel stud patterns was achieved by over-sizing the 5 holes in the rotor to allow it to work with both stud patterns, both vehicles using M12x1.5 studs.
So, what does this have to do with wheel stud patterns? It's the reality that just as a rotor is centered on/by the hub, so that the rotor does not "orbit", causing an imbalance/vibration condition, the wheel relies on this same centering action, to minimize vibration. Mounting wheels that do not have the same bolt circle, let alone the same center bore, is not consistent with the efforts made by the OEM (GM in this case) to provide this centering feature.
Since the (2002) FWD Impala has a matching center bore to the (2002) RWD Camaro, would it be OK to use Impala wheels on the Camaro, considering the rotor is common? Well, with 115mm bolt circle (BC) on the FWD platform, and 120.65mm BC on the Camaro, the answer is no, even though they're hub-centric. The same logic applies with the mismatch of BC between Corvette wheels and Zeta platform--AND they are NOT hub-centric!