No problem man.i understand completely. Btw with offset negative is toward the curb and positive is toward your truck. So higher the positive the more your tire is tucked in, larger negative means the more your tire will stick out.
18mm-25mm offset should work fine without rubbing. If you go lower in offset the rubbing will start. 0mm will stick out an 1 1/2" more than stock. You could run them, but will definitely need to do the pwm.
I'm running 305/55R20's on a 20x9 with +1 offset with a PRG Mini Lift (1.5" front x 1" rear).
I would guess I stick out about 1.5". I was definitely rubbing at full lock. I just did a slight PWM this past weekend and have just enough clearance not to rub. It's magical to turn full lock and not hear that sound.