Speedometer Error with R1250RSs & TFT Screen

[Grumpy Goat]

https://www.cycleworld.com/sport-rider/h...emperature.

"Speedometer accuracy is very dependent on tire diameter, which is affected significantly on a motorcycle by pressure, load, and temperature."



Yeah I see this whenever this topic comes up, and while it is clearly true (it is geometry after all) it does not diminish the fact that there are other vehicles / bikes that manage to tell speed accurately. The same rules apply to all, and some bikes seem to not be able to do this as well as others. In my RS's case the tires are stock and kept at the [bike] manufacturer's specified pressures at all times, and the deltas don't appreciably change as the tires warm up.