Biggest tires with stock wheels

I have the stock performance pack wheels with the PZeros, whats the biggest rear tire I can get with these wheels?

Its been talked about many times. 305/35r19 on the rear. Do a search. Lots of pics

275/40/19 front and 305/35/19 rear

smann said:

I have the stock performance pack wheels with the PZeros, whats the biggest rear tire I can get with these wheels?

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All the above said, you won't gain as much tread width as you'd think going beyond 285 on the stock 9.5" wheels. Yeah sure, you can fit a 305, but it'll be so bulged that you're wasting some of it.