View Full Version : Speedometer Calibration / Adjustment

10-24-2010, 10:26 AM
I ended up getting great deal on some A3 Wheel with new tires, the wheels offset is 56, so I will end up using spacers, but that is a different subject altogether.

The tires that are mounted are 205/40-17's as apposed to my stock 205/60-15's. Is there anyway using VAG COM to recalibrate or adjust the speedometer?

I know there are aftermarket speedometer adjustment hardware kits that you can buy, but I was curious if anyone knows how to do it any other way.

Thanks in advance for the input.

10-24-2010, 11:41 AM
*Edit: Jeez what was I thinking? Not the same circumference tires at all :P

10-24-2010, 11:51 AM
i had 205-60-15
now have 215-35-18 stretched.
only 1 mile an hour diff.
i think you should be fine

10-24-2010, 12:14 PM
I think youll be fine too. My speed vs the speed with GPS is about 2mph off.

10-24-2010, 12:54 PM
i wouldn't worry about it. look up the speed difference and just drive while keeping that in mind.

10-24-2010, 02:25 PM
I just figured if I could change it, I would. The difference is about 5 mph at 65mph. Its just a little annoying.

If it can't be changed through the vag com interface, perhaps I could install a potentiometer inline with the vss wiring. Although than I would need a way to know what 65mph was to set it.

10-25-2010, 08:52 PM
I am interested to know this as well. I would think vag-com would be able to do this.