I found the number in the meantime, here it is, should anyone else be interested:
42601-60170
Although they are very similar, there are slight difference between the two wheels:
- Appearance wise, the 15 inch wheel has a welded central disk with smaller trapezoidal holes than the 16 inch wheel. The 16 inch wheel has a formed and welded central disk.
- From memory, the 15 inch wheel has zero offset whereas the the 16 inch wheel has a 1/4 inch positive offset (correct me if I'm wrong).
See the included two pictures for comparison.
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