Latest build does not address distance, elevation gain issues

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    Lorne

    For future reference, the updated build version that I'm referring to is 1.189.994.12. The previous build that I refer to was in effect for most of February - Lorne.

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    Derbyshire Pantani

    @Lorne strange, only seems to be certain units affected, I'm still running the Feb build, I haven't updated yet wanted to hear feedback from the HH community. I rode 200km at the weekend through the peak district, the elevation gain was right where I expected it to be and my friends Garmin 830 was a few hundred ft higher, 9600 vs 9800ft which sounds correct due to slightly different route to meet up point, but even if we started exactly at the same point that margin of difference is common place between different garmins even the same models.

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    Lorne

    You might be onto something, @Pantani. Maybe the greater the steepness of the climb, the less of a discrepancy.

    I did a ~20 mi., hilly ride today with the Strava app and the Karoo running. Karoo's 4.8% distance overage matches the above observation of 4.7%. But Karoo's 640 ft. elevation gain was "only" 20% more than Strava this time. That's a drop from the above flatland ride discrepancy of 50%.

    Again, for comparison with other platforms, three matched rides with a Wahoo were inconsequentially different (0.05%, s.d. = 0.09) from today's Strava distance. Their estimated elevation gain ran 5% over Strava (s.d. = 2).

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    Gene Berry

    I'm experiencing significant mileage differences with the latest build (April 22 of 2021) for the Karoo 2. When I upload my ride to the Hammerhead website the map shows the correct mileage, but the unit records a much higher (and incorrect) mileage that it sends to Strava. I did a 55.4 mile ride with a friend who was using a Garmin to record the ride, which is the mileage Hammerhead displays on their website. My Karoo 2 recorded the ride at 57.5 miles...a pretty significant difference of 2.1 miles.

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    Michiel

    @Berry Do you use a speed sensor? As (looking at similar topics) there seem to be issues with the auto-calibration of the speed sensor, this may explain the behavior you are seeing.

    I decided to get rid of my speed sensor. Was using one for years with my Wahoo Bolt, otherwise I would have a lot of speed fluctuations. Now with the K2 I hardly see any speed fluctuations. I guess because of a better GPS accuracy.

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    Benno Zwanenburg

    On the road there won’t be much difference but for MTB rides you really need a speedsensor for much better accuracy, especially when driving curved singletracks in the woods. And keep the speedsensor above gpx in the settings!

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    David Horn

    What were the weather conditions on your rides? Windy weather will lead to false elevation readings as the barometric pressure changes with the gusts.

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    Lorne

    Interesting idea, @David. I pretty much noticed the discrepancy on every of the 30+ rides I did before I had to give up on the device at the end of the trial period. Most were done in less than 10 mi./hr wind conditions.

    I would advocate for the option to disable the barometer and both extend battery life and take some of this variance out of the elevation gain readings.

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    Benno Zwanenburg

    Sorry to say but I think this device is perfect with elevation and distance. I’ve done lot’s of rides and compared the data of the same rides with eachother and they are always > 99% the same. But Strava on my iPhone, which is recording elevation and speed by gps, is much more inaccurate.

    About battery life, I have always set brightness at 100%, have a speedsensor and iPhone connected and 1 hour of riding is 8-9% less of battery life, so without reducing brightness I can make rides till 11 hours. 

    You must ignore the elevation in the dashboard because it’s far off and this will be corrected in future updates.

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