How much negative offset do I need

Hi Guy's

I'm trying to get some info or pics of how much -12 or -19 offset will look on a 5th gen 4Runner.
I plan on running 20" wheels with 285/55/20 tire. I want to see how much it sticks out side of the fender well. I want that bold look but not sticking out to crazy. I still have some time before new 4Runner arrives so I'm trying to get some info before deciding on wheels and tires. Any pics will help.

Thanks

 

Haven't found much info on 20" wheels as many on here seem to prefer the 17"

Any updated pics? What wheel size and o/s did you end up going with? Where you able to keep the front mudflaps?

 

I ended up going with 20X10 -18 offset and 275/55/20 Nitto ridge grapplers. I took the front mud flaps off because I didn’t like the looks of it.