Santa is stopping at my place first this year.....as I sit on my porch wanting for my scangaugeII......
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I run 255x45x18 tires. the factory size is 245x45x18. I know that the car odometer and mpg gauge is off by about 3% because on my last long roadtrip i used my garmin nuvi gps to track my true mileage.
Does the SGII allow for adjustment for tire size?
