most programmers are able to calibrate ur computer by punching in the new tire size into the programmer like a superchips or hypertech

thats what ive been told but i took it for a road trip with the corect tire size punched in and i had it tellin me i was doin 75 my garmen tellin me i was doin 83 and my in dash speedo tellin me i wus doin 60sumthin :argh:

all else fails get a friend thats a cop and have him radar you

i drive a lifted truck in a farming comunity. all the cops love to chat on the side of the road and document anything wrong with my truck. but i'll c thanks for the suggestion!