What is the largest wheel and tire size were able to run? I'm not lifting or Lowering but I want that stance!

I wish my wheels were bigger..

 

Go here: https://tiresize.com/tires/Ford/Ranger/

Scroll down to your year
It will list the stock tire sizes that came on YOUR Model that year

You can safely go 1.5" larger in diameter than the largest tire for your model that year, not any model, your model

Click in the size and it will tell you the diameter and width
i.e.
225/70R15
Diameter : 27.4"
Width : 8.9"

You could go to a

235/75R15
Diameter : 28.9"
Width : 9.3"

About 1.5" bigger