Yea I want an official answer, I've searched around but no one seems to care much for the speedometer being off.
While "places" that are unnamed take like an hour or so to calibrate the speed? Shrugs* Can the Subaru dealer program it?
I want to go from
245/40/18x8.5 (stock)
to
255/40/18x9.5
I was going to do 265/40/18x9.5 but they said it would rub on stock suspension(fenders would need to be rolled) and also it would rub on 255/40/18x9.5 unfortunately.
From 40 to 35 the speedometer would read about 3mph faster than normal and I would believe the odo would also be going up on a faster rate as well which nobody should want! lol