Wheel swap question

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Hi guys,

Can anyone see any problems swapping the older style 16inch jk wheels currently on my 07 jk for the later model 17 inch wheels from the 08 onwards jk's ?

I think the outside diameter is more important then wheel size...
Placard states 245/75/r16 for 07's (30.5 inches)
And if I go to the 17s i will probably put the 265/70/r17 (31.6) I'm thinking cooper st maxx

So I'm pretty sure they fit ok.. But any legal issues?

Oh an I have no lift at the moment but will probably fit a 2 inch shortly

Thanks

Drew