Yes - it's in the "MORE" menu. The offset for your speedometer/odometer is under the "SPEED" option.
I have mine adjusted because I'm not running the OEM spec tire size for the transmission in my car (though I swapped transmissions, not tires).
With your larger tires, your speedo/odo will be reading low, so you'll have to use a positive offset in the
ScanGauge to compensate.