my garmin is reading double speed

[z4RRSchris99]

got on the turbo last night and although i am super human i think it was reading about double.

its an 810,

any ideas?

[ALawson]

Has the wheel size been changed on the setup?

[Usget]

It's set to km/h.

HTH

[z4RRSchris99]

fixed it. The magnet was reading twice. no idea why

[littleandy0410]

You had 2 magnets fitted, didn't you?

My guess is you has the sensor fitted too close to the hub, and it was reading on the opposing side of each revolution?

[47p2]

Lots of KOMs now

[z4RRSchris99]

I moved it more to end end of the sensor and it fixed it

[GarryDK]

47p2 said:

Lots of KOMs now

Beat me to it! lol.

[loudlashadjuster]

Some switches can be sensitive to placement, as they can read twice in certain positions. Sounds like you experienced that.

http://sheldonbrown.com/cyclecomputer-magnet.html