Saw a truck around town today with a ridiculous lift kit and chunky off-road tires that were clearly much larger than factory standard, and it got me thinking; if you install this kind of modification in a car, do you need to adjust the speedometer to compensate? What about the odometer?
My logic is the only absolute measurement the car has is how fast the wheels and drive shaft are turning, so presumably there is some sort of multiplier - 1 revolution = X meters - that is then used to show speed and track distance travelled, but that factor would need to change if the circumference of the tires did
I’m sure there are some cars that can adjust the speedometer automatically or something but in my experience if you change the outer diameter of the tire it will throw off your speedometer.
I actually don’t know if it messes with odometer. I imagine it would if the odometer is running off the same senser that does the speedometer.