ok so Greg says if your car came with 16" wheels you can run 16's or 17's

You say if your car came with 16's you can run 15's, 16's, or 17's

so the part that says
Cars classified in ITR may utilize any wheel diameter up to
17” or retain their stock diameter wheels if larger.

Over rules this part that says
Cars may not fit wheel diameters smaller
than those listed on their spec line

Sorry just want to make sure I know for a fact because this will have a effect on my plans for next season.