Ok, I have been going round and round with Discount Tire on this. My original wheel and tire (17" Konig Reigns) order came with only 3 plastic hubcentric rings so I went back and they gave me these aluminum ones with a 63.4 mm hub diameter and they put them on. As soon as I got up to around 60 mph it was like driving on bouncing basketballs so I went back and we took off the wheels and sure enough the rings were not as tight on the hub as the plastic ones. Unfortunately, the plastic ones have no part number and they cannot find anymore. They are willing to make custom ones if necessary but I need to know what the correct hub diameter is for a 2000 SVT. Anyone know? Otherwise I guess I'll need to invest in a decent micrometer.
