I have 285 75 17 on 2005 f250 4X4 6.0l and have been running them for about 4 years. I was wondering if it would be worth the $100.00 to go to the dealership to recalibrate the PCM for the tire size. Also Im guessing it isnít hurting the transmission either, just not sure. Thanks<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
It won't affect your mileage or driveability, only where the speedometer points. I wouldn't do it if they charge anything over $50 and especially if they will charge to do it again if not accurate, it sometimes takes a few iterations to get it right on.