Distance measurement discrepancy between the app and indoor trainer

Bugs and Issues
1

Hello TrainerDay community,

I’m currently using the TrainerDay app in conjunction with the Kettler Hoi Ride+ indoor trainer. I’ve noticed a significant discrepancy in the distance measurements between the trainer’s built-in display and the TrainerDay app - sometimes nearly double the distance on the trainer’s display.

From my understanding, TrainerDay calculates distance based on power output, rider weight, and drag coefficient, rather than relying on the trainer’s speed data.

Given this, I would assume that the TrainerDay app’s distance measurement is more accurate, as it considers factors beyond the trainer’s internal calculations. However, I’m curious to hear from others who might have experience with the Hoi Ride+ or similar trainers.

Looking forward to your feedback!

2

I would assume that Hoi Ride+ is outputting speed and not power and we convert speed to power and back to speed :slight_smile: Can you send a screenshot of your connections screen with the services expanded (click on it so you show what is connected). You can adjust the speed in our app if you want by changing your drag coefficient on the website.

3

I wasn’t able to connect to the trainer and heart rate monitor, but I do have those options selected.

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4

Oh yes so it shows you have power meter. So I just had a look at your most recent training and when I compare average speed compared to your average power, it looks accurate.

I would say if your trainer has semi-accurate power then your trainer is reporting speed that is drastically wrong compared to how fast you would go outdoors with that much power, assuming you rode outdoors more like a road biker than someone on a mountain bike or city bike (very upright and very slow tires).

You are saying your trainer is reporting 2X less speed speed? That would be incredibly slow and 2X more speed would be incredibly fast compared to what I see on your averages on our website for your, which looks good.