Originally Posted by
tomato coupe
GPS is far more capable of the accuracy the OP is interested in, over the distances that the OP is interested in, than any distance measurement based on the circumference of a tire.
He's apparently interested in differences of 1.4%. It's possible that the wheel sensor would be better generally than the GPS in practice.
https://www.dcrainmaker.com/2019/04/...th-review.html
Of course, the main reason you’d use this sensor is to display speed and distance on your bike computer, most likely off-road. For the most part, GPS is more than accurate and stable enough these days on-road for most cyclists. Whereas off-road mountain-biking in dense forest or with switchbacks, that’s where you’d probably want a speed sensor to give you better distance accuracy and better pace stability.
The wheel sensor also works better for instantaneous speed.