Originally Posted by
rebayona
I own a 530 and I've noticed the speed reading is moving around numbers while climbing (mountains/trees around) despite I have a speed sensor. It is like 20... 21... 11...14... 21... and I'm at a steady pace!
Am I missing some setting somewhere? It is like it is not using the speed sensor and the speed is being calculated through the GPS only.
If you are climbing at 21 km/h.....you must be a really fast racer. If you are climbing closer to 6-8 km/h and the displayed speed is jumping around and it is a device that measures speed with wheel rotation, you are seeing aliasing error (nyquist frequency).
The other possibility is GPS. GPS speed is inaccurate over the short run, especially on curvy, tree covered climbs. Have you checked that your speed sensor is enabled in "Sensors"