Whats the biggest rotor that can fit under stock 16 inch wheels?

Just like the title says. My rear drums are not working anymore so I am thinking it is time to upgrade front and rear. I want to swap the rear to discs as well.

The sticky at the top of the page may be helpful. The following link toward the bottom may provide some food for thought on the drum to disc swap:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC