I just replaced my P255/70/17 on my 2015 with terragrap g2 in P285/70/17. If I recalibrate speedo will it improve throttle reponse or mpg? Not sure if nowadays they also use speed to effect shifting or when V4 is enabled. At least that's what I've read a couple people said, but not sure I'd they're just blowing smoke.
I don't care if speedo is off 5%, but with 3.05 gears I've noticed truck is more sluggish. I understand the increase in diameter requires more torque to turn but I'm surprised it was that noticible.