HELP: What is the largest wheel & tire combo for E30 M3

[118811]

I need your expertise!!

I have a 1988 M3, which I love!!

What is the largest wheel & tire combo I can run?

What is the best offset, also?

Thanks for your help!!!

Any other info would be greatly appreciated.

Aloha,
Frederick

 

[Beemerworld]

You can go up to 18 inch but 17 is what you should look for.

Im not shure about the offset.