Hi, I'm brand new here and a first time Ram owner. I bought a 2021 1500 Laramie. It came with 285/60 R20s that were added by the previous owner. The truck is supposed to hav 275s so as you know the speedo and Odo are reading lower than the actual ratings. The dealership said there is no way to correct the speedo but I don't buy that, it's a computer after all. The speedo reads 9km/h lower than actual at 120 km/h. I'm not really up on the gadgets that can be used and I would hate to screw something up. Can you lend a fella a hand?
Thanks,
J