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Garbage max speed indications

AuldNik
over 2 years ago

Recently - like over the past couple of months, since installing the 6.40 FW on my 1030+, I have several times noticed that the built-in max speed field on the 1030+ is showing a value that is much too high. I'm only using GPS, no speed sensor on the bike. For example, after an easy 20km flat ride this morning to the meeting point for our training group, where my speed wouldn't have exceeded 35kph at any point, the max speed field was showing 66kph. And a few days ago, where I might have hit 50kph down a couple of small hills, the max speed was showing 89kph.

I can never remember seeing this large discrepancy previously on the 1030+, and I can't recall ever seeing it at all on either the 1000 or 1030 that I previously used.

  • 0 over 2 years ago in reply to Pete

    There are some reports, that mounting the speed sensor on the rear wheel leads to bad readings due to magnetic influence of the chain.

    I suggest to switch the sensor to the front wheel for testing purpose.

  • 0 over 2 years ago in reply to mcinner1

    Is there any way to just use gps for speed & get rid of the speedsensor2 alltogether ?

    These constant dropouts are driving me nuts

  • 0 over 2 years ago in reply to Pete

    Does the same thing happen when you ride without the speed sensor?

  • 0 over 2 years ago in reply to Garmin-Maeve

    Hi Maeve,

       I will try this on friday & let you know on here & send the stats/graphs to your email

    That rubber enclosure is ridiculously difficult to put on & remove & if i remmeber, it was very hard to try to get it on the front wheel hub, which is why its on the rear wheel

    The rides are on the road trail adjacent to a small airport & the only time I have lost gps is when going under a bridge, but this speed thing is so random along teh whole ride that it causes the unit to start/pause/start/pause about 20 times on one ride which is annoying.

    I did update to 6.50 this morning & it seems to have fixed the "flat-line" heart rate monitor issue, though the speed dropout issue is still there

  • 0 over 2 years ago in reply to Pete
    Pete said:

    That rubber enclosure is ridiculously difficult to put on & remove & if i remmeber, it was very hard to try to get it on the front wheel hub, which is why its on the rear wheel

    I, too, have a big front wheel hub. I extended the rubber with a spare of the Edge mounting rubbers. Works great!

    It is essential to have the speedsensor on the frontwheel when you have problems on the rear wheel. 
    You should try!

  • 0 over 2 years ago in reply to Pete

    Did a test loop without any speed sensor, so the unit was forced to use GPS

    1.  No drops in speed at all during the ride

    2. Average ride speed is much higher then when I use the sensor

    3. Unit did not start/pause all the time

    4. The ride path was the same route as previous rides

  • 0 over 2 years ago in reply to Pete
    Pete said:
    The rides are on the road trail adjacent to a small airport

    What do you classify as a small airport? Does it handle commercial scheduled flights or just private light aircraft?

    What happens with rides using the speed sensor that are well away from this airport?

    The Speed Sensor 2 uses the planets magnetic field as a source to sense movement and is therefore susceptible to interference from large external magnetic fields. Cabling buried in the ground for lights and other airport systems could be a source of a disruptive magnetic field.

  • 0 over 2 years ago in reply to Scillonian

    Small Cessna 172.  One runway

    https://en.wikipedia.org/wiki/Oceanside_Municipal_Airport

    The drops happen at verious places before the airport as well & Garmin has all my ride data at this point.

    I have done one ride without the sensor per my above post & now moved the sensor to the front wheel & havent done any rides as yet due to the heatwave. Will be testing this config in the next few days

  • 0 over 2 years ago in reply to Pete

    Tested same ride again with speed sensor  2 on front wheel hub this time & there were no drops

    Heart rate sensor is really erratic & I have rinsed & cleaned the strap (without sensor attached) and changed the battery, even though its barely 6 months old

    Will try a few other things & probably switch to the Wahoo heart sensor instead

  • 0 over 2 years ago in reply to Pete
    Pete said:
    Heart rate sensor is really erratic & I have rinsed & cleaned the strap (without sensor attached) and changed the battery, even though its barely 6 months old

    I use both the Garmin Heartratesensor and the one from Wahoo.
    The Garmin HR needs to be made very wet (gel or water) to work properly.