hoffbrew
03-24-2010, 10:55 AM
Just some info, I upgraded to 35" tires with 17" rims on my truck awhile ago and my speedo has been off. I just purchased a Superchips 8416 TirePaq to recalibrate and worked perfect. Easy to use. Now I will see if my gas mileage will improve, according to Superchips, by doing this I should increase MPG about 20% ....