Sync Runner 3 with Turbo Trainer — TomTom Community

Sync Runner 3 with Turbo Trainer

SGStepSGStep Posts: 3 [Apprentice Seeker]
Hi there,

I have recently purchased a turbo trainer (Elite Aleno Smart Elastogel from Decathlon). The turbo trainer connects to my phone (using the supplied app) and seems to work perfectly. However, I was very keen to connect the trainer to my Runner 3, so I can view all my activities within TomTom Sport. The sensors are both Ant+ and Bluetooth (apparently).

The Runner 3 picks up the cadence/speed sensor in the turbo trainer very quickly and get's a good signal... except it's picking up silly results. The Runner 3 was saying I was cycling at 220km/h, which I don't think is quite accurate... I tried to work-around by reducing the 'circumference' of my tyre 150mm. This gave me more reasonable speeds, in the 30km/h area. However, the activity logs show this significant amplitude in both the speed and cadence. See screenshots below;

As the Elite app gives sensible results, I think the issue is with how the Runner 3 is interpreting the results from the built-in cadence/speed sensor.

Has anyone experienced this before and/or got any bright ideas?

Thanks,
Sam

cf9dd9f4-2d48-4e42-b39a-5d1b8dd7e1ee.pngb82acd2a-66c4-432c-a355-d6447522f737.png

Comments

  • tfarabaughtfarabaugh Posts: 15,782 Superusers
    While the watch is not necessarily designed to pair with trainers (so it may be incompatible) if it is seeing it, it might work. However, the key is to get the wheel size right. You cannot estimate it, you need to measure it exactly, down to the thousandth mm (i.e. 2,200 mm). I would not use the default for the tire size, get a fabric tape (or even a string) and measure the circumference of the wheel at the center. Guessing is not going to work as the speed is directly based on the wheel size.

    I hope this helped answer your question. If so, please mark it as a solution so others can look for it if they have the same question.
  • SGStepSGStep Posts: 3 [Apprentice Seeker]
    HI tfarabaugh,

    Thank you for your response.

    Unfortunately, the wheel size is not the issue as the speeds are way out.

    To reiterate the issue;
    • My measured wheel size of 2,185 mm is providing speeds of 220-450km/h
    • I've scaled down the wheel size to 0,150mm to get 'reasonable' speeds of 20-30km/h. Obviously this is not the size of the wheel, though I was trying to find a work-around.
    • The speed and cadence measured vary wildly around these averages. As you will see from the attached graphs, the acceleration is so great that graph is nearly completely 'coloured in'.
    Thanks,
    Sam
  • tfarabaughtfarabaugh Posts: 15,782 Superusers
    In that case it is likely an incompatibility with the sensor built into the trainer so there is nothing you can do about it. This is an edge case as it works with stand alone speed/cadence sensors (mine works flawlessly with two different sensors - a TT and a Wahoo) so they are not going to redo the software for one device. Add to this the fact that TT left the industry six months ago, recalled all inventory from the US and laid off the entire Sports Division and it is what it is, you will have to live with it unfortunately.

    I imagine this is not what you were hoping to hear but let me know if this answered your question. If it did, please mark it as a solution so other can look for it if they have the same question.
  • SGStepSGStep Posts: 3 [Apprentice Seeker]
    HI tfarabaugh,

    Thanks for your response. It's unfortunate that I won't be able to use my watch with the turbo trainer but I understand all your points. I didn't realise that TT was making such a change to their wearable range. I picked a bad time to change over from Garmin!

    Thanks again,
    Sam
  • tfarabaughtfarabaugh Posts: 15,782 Superusers
    SGStep wrote:
    HI tfarabaugh,

    Thanks for your response. It's unfortunate that I won't be able to use my watch with the turbo trainer but I understand all your points. I didn't realise that TT was making such a change to their wearable range. I picked a bad time to change over from Garmin!

    Thanks again,
    Sam
    If you are able, you may want to consider returning the device and going with another brand from a company that is actively in the sports watch market and intends to continue producing and supporting devices.
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