Possible to change tie size in BCM?

[chasers]

I would like to move up from the stock 265/75/16 to 285/75/16 and according to my calc's that will throw the speedo off by 2.4 MPH at 65MPH (actully travelling at 67.4MPH).

Since the adventure comes with this size tire, is it possible to have the service dept change the tire size within the BCM to reflect the difference? If so...could someone please tell me how this is done so that I can convey it to them.

I know a few of you will say to just live with it, but I pass no less than 3 freeway troopers/township police every morning on the way to work, and they can be QUITE aggressive.