Tire size calibrations

[Garfy]

I was just wondering if there's a way to calibrate the vehicle's system if you change the tire size on the car. Say, if you were to replace the stock 18" wheels with 19" and the overall diameter of the wheel and tire is smaller or larger than the original stock tires, how would you reset it so that your speedometer/odometer and other systems that are reliant on that data is correct? I'm presuming that systems like the ABS, cruise, etc. would all be affected. Would there be something in the engineering mode and if so, what's it called? Thanks!

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[Cory S]

It’s self calibrating somewhat, unless you completely go out of range..

I can go from a 25.7” tire to a 28” tire without any changes. Speedo is dead on with GPS, with a 28” tire and the factory axle ratio.

 

[Finally21]

https://tiresize.com/speedometer-calibration/

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