FlyYellow

I have an '08 987 (that's current stock ride height but will likely get PSS-10's at some point). Can I fit 20x11 wheels in the back without rolling my fenders? And if yes what is the offset?

While we are at it, I'd also like to know what are the offsets that will get me a more aggressive front look for both front and rear. Let's assume the front is an 8.5" wheel width.

Thanks in advance for the help.