Garmin Edge Spikes

[Plax]

I had a top speed of 147.7mph on my Garmin on Sunday.

 

[TheDoctor]

I had a top speed of 147.7mph on my Garmin on Sunday.

No wonder I can't keep up!!! I thought I was just unfit...

 

[fossyant]

Look..mine has lost the map twice...don't worry.. re-boot.... oh..if the HR goes out.... get a defibrillator..

 

[jimboalee]

There's a small hillock just south of Warwick which the road goes over.

My Garmin Edge 605 goes funny when I ride over the hillock.

There is either a large lump of metal under the hillock or a hidden spacecraft waiting for its owners to return.

 

[DrSquirrel]

Question for you all - are you using the CAD unit for wheel speed?

GPS can stutter so calculating speed in situ is erratic, take a look on your maps and see if your position randomly shifts. I am not really surprised at GPS speed, it's poor.


RE: Interference from the CAD unit... From what i've seen on my 305, garmin doesn't export the speed from the CAD unit, it just calculates distance vs time. It does put your max speed in a header though which could just be from the CAD unit, so that's worth a check.

<Activities>
<Activity Sport="Biking">
<Id></Id>
<Lap StartTime="">
<TotalTimeSeconds></TotalTimeSeconds>
<DistanceMeters></DistanceMeters>
<MaximumSpeed>12.1199999</MaximumSpeed>
<Calories></Calories>
<Intensity></Intensity>
<Cadence></Cadence>
<TriggerMethod></TriggerMethod>
<Track>
<Trackpoint>
<Time></Time>
<Position>
<LatitudeDegrees></LatitudeDegrees>
<LongitudeDegrees></LongitudeDegrees>
</Position>
<AltitudeMeters></AltitudeMeters>
<DistanceMeters></DistanceMeters>
<Cadence></Cadence>
<SensorState></SensorState>
</Trackpoint>
.....

In the header (it's in m/s).