Oh and I BELIEVE the center bore is 7mm diameter on the 1st gens, and is the same on explorers up to 01 or sports up to 03, I'm not sure about after that, as I don;t see any earlier explorers with 3rd or 4th gen wheels running around. But like I said anything with a center bore of 7mm or larger should fit. technically with a hub centric wheel like these, you aren't supposed to have a larger center bore because the hub holds most of the weight and the lugs just hold it in place, but with 2nd gens it may be different seeing how the automatic hubs don't stick out from the wheel like 1st gens.. I've run aftermarket steel wheels with a larger center bore for months at a time with no issues.