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Indoor trainer. Follow a course. Bike and rider setup

kdx200
over 3 years ago

Ive been riding in that way and seems to be nice with tacx neo2 and edge 820 and then 830 setup.

The question is where in thre edge menu and what variables is the tacx using to simulate.

I found the bikes weight field only under the ant trainer menu.

What about the kind of bike? What about the wheels? What about my height and my weight or even my cda?

I know that the tacx uses the power to simulate my speed...but only using the power.? It is no the same in a TT bike with 25mm wheels than a mountain bike . Also is not the same a 100kilogram body and a 70kilogram one.

So... someone knows about this?

Thank you

  • 0 over 3 years ago

    I have always assumed it used a fixed average model to calculate simulated speed and distance.  It might take body weight as an input, but IDK.  I've never looked into it further as what matters to me when using a trainer is the effort level and durations (e.g. Trainerroad workouts). Speed and distance is factually zero.  When riding with others in a virtual world like Zwift, Zwift uses a much more complicated model with participant specific parameters and effects of rider interaction (drafting)  to calculate the simulated speed and distance in order to make game play more interesting.

  • 0 over 3 years ago in reply to looigi

    Thanks, perhaps someobe knows that if is a fixed average as you asumed or how is working. Regarding zwift or those apps are another world, so hats why i especially titled this post the garmin option " follow a course" .

    Thanks luigi

  • 0 over 3 years ago

    Rider weight & height are buried in My Stats>User Profile and Bike Weight in Training>Indoor Trainer>Sensor>?. All can be also entered via Garmin Connect Mobile and/ or Connect and get shared around.

    My experience with 530 & Tacx Flow (would like to have a NEO) is that it broadcasts Power, Speed, Cadence. I also have separate Speed and cadence sensors and they mostly match the Flow ones if I disable either for comparison. So I am assuming the Garmin is reporting just the Power, Cadence and Speed as broadcast and the distance is derived from the speed. Again in my experience the Garmin is not doing anything fancy with the speed, just reporting the sensor number.

    This is different to the Tacx Training App which derives the  speed using the sensor numbers modified by the grade, my numbers on the Flow when using the App are much higher overall and especially down hill, much more satisfying. The resistance for a zero (and negative) grades is (seems) higher with the Garmin controlling than when the App is controlling

    This Garmin support page talks about "Virtual" vs Garmin reported speed

    https://support.garmin.com/en-US/?faq=M0wRO9OkFb9PrFlWgNfJn9

    I spent much of the lockdown time in the last 12 months "following" the 1200km Paris-Brest-Paris route on my Garmin, would have been much more realistic if it used the same algorithm as the App.as down hills on the garmin are just as hard as flat (both harder than real life.). With the App my numbers for uphill, downhill & flat are very close to what I get in the real world for similar grades but when Garmin controlling my uphill is 50%+ faster than reality, downhill much slower and flat slower.