Powerfly 7 problem with speed on computer

[LordJura]

Hi,

I bought Trek Powerfly 7 half a year ago. And now I have problem with speed on cycle computer. If I ride around 20 km/h, the speed on computer starts jumping around - 24, 18, 23 etc. But in real the speed is still the same 20km/h. Diagnostic looks OK.

Does anyone had some issue?


Thank you

LJ.

 

[TMH]

Have you checked if it is something as simple as the speed sensor magnet on the rear wheel having been bumped out of place so the signal is not optimal to the sensor itself? I don't have familiarity with the specific bike but if it has a spoke mounted sensor magnet and a chain-stay mounted sensor, this could be the issue.

Rotate the wheel to line them up with one another and make sure that the magnet is squarely facing the sensor. And make sure that the sensor magnet's screw is tight.

 

[fast]

you should be getting a 503 error code and the speed sensor should be lined up the right way with the magnet
there are pictures of how it should be line up on line.

 

[fast]

 

[LordJura]

Thank you for your advices. I will check speed sensor on the rear wheel.