Assuming you are currently running 265/70/17 the move to 285/70/17 will increase the diameter by 3.5%. So if the speedometer reads 60mph you are actually going 62.1mph. I have the same on a 2021 TRD Off Road with 2.5” Ironman Lift. Looks great. If you can fit 285/75/17 that will give you an...