Originally Posted by VaderJK12
Inaccurate speedometer means inaccurate odometer.
I used to think this. However, I've read things over the years that say the speedo comes from the factory intentionally set to read slightly high for liability reasons, while the odometer is spot on. With the bigger tires he installed I guess both are no longer accurate but if he gets the speedo to read right then the odo will probably read slightly low.
I installed a speedometer calibration tool on my motorcycle where the speed was reading about 6.7% too high from the factory. That part is now accurate but the 25 mile ride to work shows slightly less now. I intend to get on the highway someday, zero out the trip meter next to a mile marker, ride exactly 30, 40, 50 or whatever miles, according to the mile markers and see how the two compare. So much to do and so little time, just haven't done it yet.