Assioma power 15% lower than smart trainer?

Equipment
21

To track TSS

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I had the same issue. I just got a new pair of Assioma Duoā€™s and they seem to be about 4-5% lower than my Quarq which was identical to my Tacx Neo. Was pretty tough riding a century with the Assiomas at much lower power however at higher RPE than usualā€¦

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@grenhall Did you ever get them to match each other?

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My assioma duo (I have 2 sets on 2 bikes) each measure about 2-3% higher than my Tacx as expected given drivetrain loss.

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No not really. Iā€™m on my second pair of Assiomas now. Will mount them on my MTB, where I have the Quarq, and record both rides to check their accuracy. I donā€™t trust the Assiomas as much as my Quarq or my old Neo. Iā€™ve sold the Neo so the Quarq is my go-to-power-meter now.

@wattsgood Iā€™ve only heard great things about Assiomas but the ones Iā€™ve had have read lower than my Neo for sure. But Iā€™ve yet to test the second pair.

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I have Assioma Duos and had bought a Neo 2. It was reading 10% lower than my Faveros at all times even after I ran all the calibration steps on the Faveros. I contacted Garmin about it and they decided to swap it out for a new unit and they sent me a Neo 2T. The Neo 2T was reading the same 10% lower than the Faveros. Not saying there was anything wrong with either of the Neos or my Faveros, but Garmin was at least concerned enough to spend all that money swapping them outā€¦

I ended up returning it and buying a Kickr Core. The Kickr Core seems to read slightly lower than the Faveros, but theyā€™re close enough that its hard to tell if theres actually even a difference. I also recently bought a Quarq DZero for the mountain bike and in the fairly limited testing I did against the Faveros, they both track very close together. Only difference Iā€™ve seen between them, is that the Faveros are not great with big 1-2 second power.

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My KICKR Core runs 7-9% higher than Assioma Duo

28

One thing to keep in mind: always check your crank length is correctly entered on your bike computer. Normally you set it once during setup, and it is an easy one to forget to double check.

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29

Or you have road and TT bikes with different crank lengths and somehow, inexplicably, the length set on the pedals is always wrong. I think my Wahoo head unit can somehow futz with the crank length, on one pedal and not the other when itā€™s 30 metres away, turned off and charging :grimacing:

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yep, need to set the crank length on the wahoo / garmin etc head unit otherwise Iā€™ve found that overrides whatever you put in the assioma app :man_shrugging:

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