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Most of the wheels came 5 lug on 100mm. It's possible it could be 5 lug on 4 1/2 (114.3mm). You can check the last number on the tire for the size of the rim, usually 15 or 16'' The offset is around 40mm positive.
To verify the bolt pattern, measure the distance of one lug hole to the lug after the next lug hole. The physical distance will be 4 1/4'' for a 4 1/2'' bolt pattern or 95mm for a 100mm bolt pattern.