I have a set of American Racing four bolt 15x7 inch wheels which came on my '92 Mustang. They seem to have a 4-1/4 inch bolt pattern, but the hub holes are too large which doesn't allow the wheel to center properly, resulting in a vibration. They came on the car when I purchased it and I quickly replaced them with the proper Pony wheels. My question is are these Ford wheels, but not Mustang wheels? Are there other 4-1/4 inch bolt pattern four bolt Ford applications that have a larger hub? I know older Mazda bolt patterns are close so I tried them on a friend's RX7 and they didn't fit. Perhaps a Mazda truck with a larger hub?