RAM 1500 Diesel Forum banner


  1. change tire size in ECU for 2016 / figure mpg

    RAM 1500 Diesel Tuning
    How do I do this? I do not want to have to order anything crazy expensive. Also, dealerships will only change it to a factory spec size tire. Mine are larger than anything they offer from the factory. Guess it's saving miles on my truck, thanks Ram! Also, how would I figure my gas mileage...