Just think you get more milage out of your warranty that way..That is why I haven't changed mine...Biker Mike said:My speedo is off too. When my speedo says 60 mph I am doing 64 mph. This is checked by gps and also the radar units set up in the construction zone . I thought jeep would have it right since mine is bone stock as far as tires and wheels but it ain't. I believe the gps. As long as you know about it you can cope but it ticks me off that a factory jeep aint right.
I have seen lots of customer complaints about speedos reading a little high, and yes the factory does run a 5-10% overage depending on the vehicle and the tire size. Of course DC engineering or Tech line will not confirm or deny this fact.PBR Stitch said:I'm stretching my memory here, but I think there is a Federal Law about the speedometers could not come from the factory reading lower than actual speed, so the manufacturers intentionally set them a little high to ensure that they pass this inspection point. Generally this should work out to about 2 or 3 mph high at 60. Now I would think that if it was greater than this there would be a problem.
Now my head hurts...