Thanks everyone. Appreciate the answers. Honestly didn't know it was a thing. At first, sounded like total BS to me from the service center at some Subaru...
My friend has a AWD vehicle (Subaru Ascent). She is telling me that since she is replacing one tire, that Subari told her they have to sand down the new tire so that they match all the other tires. They say it's a 4WD thing. Is this true and is this something we would need to do on our Broncos?