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Update with cycling dynamics for Assioma

BTI Cycling Dynamics, Favero's cycling dynamics


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Favero has been announcing the firmware update of its pedals for several months Assioma to include cycling dynamics, and yesterday it finally became a reality. Version 4.04 announced yesterday offers BTI Cycling Dynamics and incorporates almost all the possibilities that the ANT+ profile allows, leaving out the one that is perhaps easiest to understand for all users... but more about that later.

If you like, I'll start at the beginning, telling you where all this comes from.

The Story

Cycling dynamics originally came from Garmin - you have to go back to 2014 to find the first reference for Garmin Cycling Dynamics.

Initially, it was one of the differentiating factors of the Garmin Vector pedals. It did not come along with the pedals, but was added later through an upgrade.

These cycling dynamics included three different metrics: standing/sitting time, power stage and centerline deviation.

Garmin Cycling Dynamics was exclusive to the American brand's pedals (and cycle computers) for several years until, in 2017, Dynastream (responsible for the ANT+ protocol) announced that it would incorporate these profiles as a standard protocol for ANT+. The fact that Garmin is Dynastream's parent company is an important detail...

So ANT+ was openly receiving the communication protocol that Garmin had designed a few years earlier. What did this mean? It meant that any manufacturer that was a member of ANT+ (i.e. all major manufacturers) could incorporate these cycling dynamics protocols into any of their devices. Everything was perfectly documented so that any manufacturer could adopt it.

By devices I mean any device, not exclusively potentiometersThis therefore also includes cycling computersBut the truth is that despite this possibility, no one has ever used it until today.

What data does BTI Cycling Dynamics provide

You know where all this comes from, now you need to know what is added to your Assioma potentiometer. Until now we already had a lot of information beyond the power you were developing. This is the most important data you will want to see on your computer screen, but there are a few more that make more sense when you analyze the activity later.

  • Left/right balancePower distribution: How you distribute your power between your left and right leg. It doesn't have to be 50%/50%, nor do you have to have the same balance throughout the workout (with fatigue comes decompensation).
  • Left/right pair effectivenessHow much do we use each pedal stroke to move forward effectively (and not to lift the pedal, for example)? Ideally, we would be on the 100%, but as we are not machines...
  • Pedal FluidityHow fluid our pedalling is, if we apply the force constantly or if we have peaks of momentum. Again, it would be ideal to have a 100%, but this is practically impossible to achieve.
  • CadencePower: Power equals torque per revolution, so the cadence is a very important data that the potentiometer must record and consequently transmit to the cyclocomputer.
  • PowerObviously... that's why you bought a potentiometer.

All these metrics were already present in the Favero Assioma and we could see them both on the Garmin screen and after the training synchronisation.


Now we add two new metrics.

  • BTI Power PhasePower Phase: This is the power phase. It indicates where we apply force during each crank turn. This is the graph we can see in Garmin Connect after synchronizing our workout.Assioma - Power phaseAs you can see, the pedaling of the left leg is different from the right one. We have two different data representations. Firstly, the semicircle that indicates the total power phase, that is, the moment of the pedaling in which we apply positive force.

    Secondly, the part that points to Peak Power, which is the exact point of greatest intensity of pedaling: the application of effective force.

    As you can see in my particular case it's not exactly the same on both legs.

  • BTI Rider PositionThis metric is much easier to understand as it simply details how much time you spend sitting or standing.Assioma - Position

If you remember the beginning of the article I told you that the cycling dynamics allowed to add three additional metrics; there is one that Favero has not wanted or been able to use; either because he does not find it useful -I doubt it- or because with its current design it cannot offer accurate data -more feasible-.

This is a deviation from the centre of the surface, which in plain words would indicate at which point of the pedal our foot exerts more pressure, whether to the left or the right. It would serve to help us place the cleats correctly in the centre of the shoe to ensure more uniform power transmission to the pedal.

The pedal hardware itself may not support being able to correctly identify if we are applying force.

Supported devices

Which devices can you use to capture the new cycling metrics offered by Favero? Well, only new units, because although the cycling dynamics have remained the same for almost 5 years, the code has changed in this time so the ANT+ protocol has been updated.

These are the compatible devices:

  • Garmin Edge 520 Plus
  • Garmin Edge 530
  • Garmin Edge 830
  • Garmin Edge 1030
  • Garmin Fenix 5 (family)
  • Garmin Fenix 5 plus (family)
  • Garmin Forerunner 935
  • Garmin Forerunner 945
  • Garmin MARQ (family)

The most notable absence is undoubtedly the Edge 520. As I said, it is not a problem of Favero, who have simply implemented the ANT+ standard, but Garmin has not updated the Edge 520 firmware to that standard.

Why are there no cycling computers from other manufacturers such as Wahoo? Because they have not wanted to adapt it, because they are quite free to do so.

Analysis possibilities

You already know what new data you can collect and on what devices you can get it, but now you need to know how you can implement it in your training.

The answer is that there is no clear direct benefit from them. It is not something that allows you to say "do this and you will automatically gain 20W". So far no one has come up with interesting ideas on what to do with this data, not even Garmin.

About the power phase, I suppose that unless we see very strange things (like the main phase being at the top of the pedaling or similar), there is not much we can do. Maybe a biomechanic can give you advice on how to improve the pedaling, but I don't think that is a fact that can help you immediately beyond checking that you don't do anything exaggeratedly wrong.

As for the time spent sitting or standing up, it is interesting to analyze the exercise in the lap tab, as you can see powers sitting or standing up, allowing you to see for example how you do a better job of pedaling uphill more time sitting or more time standing up.

Cycling Dynamics - Lap Times

There are several laps that don't have separate times recorded, I guess it's because the laps are too short (it's a series practice with the bike) and Garmin needs a minimum duration to be able to provide data.

In any case, if you want to fiddle around a bit and pry, I leave this training to you I did yesterday after I upgraded the pedals to this version of the firmware.

It is clear that this is not a data that makes the Assioma much better, but it is one more sales argument that Favero can use in their favour. It was one of the aspects that differentiated the Assioma from the Garmin Vector 3 (apart from the design and the fact that the Garmin pedal has the gauge integrated in the body of the pedal), the price difference is now noticeable in favour of the Favero.

And with that... thanks for reading!

Buy Favero Assioma

If you want to buy the Favero Assioma at a good price here is a good option, with a reduced price. There are two versions available, the UNO that measures the power only on the left side (and doubles it) or the DUO, with independent measurement on both legs.

It is true that if you buy the ONE and later you want to move to measuring both sides you can do so, but my recommendation is that you buy the DUO directly. As you have seen before, the balance is not always 50-50, and can vary throughout the training or competition, so if you want to train and compete for power it is much better to have the real thing than to double the power by two.

Favero Assioma UNO

Price Biciescapa

Favero Assioma DUO

Price Biciescapa

Eduardo Mateos

I've been surrounded by electronic devices of all kinds for more than 25 years. Using them, testing them, taking them apart and dissecting them. Long distance triathlete: I swim, run and cycle for a long time. Maybe too much.

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    1. Yes, of course. In fact what this article is about is the potentiometer update, without this particular model (or Garmin's Vector 3) there are no such metrics.

  1. Thank you, Eduardo.
    Questions: Where can you get them? Are they more expensive on amazon than on the original website? Don't you put a purchase link? What potentiometer to start in the world and with a normal bike would you recommend? Better on pedals or on the crankset?
    I just got the 530 garmin edge and I got the Phoenix 5 plus.

    Thank you,

    1. Biciescapa has it well priced. I just added the link.

      As for potentiometer I like very much the option pedals for the ease of installation, because they are totally universal and because you can change it in 1 minute. With a potentiometer on the spider or crankset you are more limited to what type of cranks you use, what cranks you will have on the next bike or on your other bike, what bottom bracket you ride, etc. If it is on the crankset, you cannot change to another development (and you also have the limitation on the cranks). If it is on the hub, more of the same. If it is on the hub and you have training and competition wheels, another limitation...

      The only thing that makes a pedal potentiometer not a good option is that you prefer Shimano cleats or use Speedplay.

      And as for one side or double, if possible, and it comes into budget always dual measurement. Power is a fantastic and reliable metric at all times; it is a pity to have it altered by multiplying the left side by two, because in that case the power you show can be real... or not.

      Personally, Assioma is the potentiometer that I use and break between my bikes.

      1. Eduardo, I've already got them. Thank you very much! I'm delighted.
        A few questions that come to mind. Do the assioma also measure the cadence? Or should I leave the garmin "cadence meter" I had installed?
        I have the 530 edge. Should I put my wheel measurement somewhere or something manually? A salute,

        1. Yes, they measure and transmit cadence data, you can dispense with the other sensor. As for wheel measurement that is only for speed sensor. The only thing you have to indicate is length of crank.

  2. Thank you Eduardo. Excuse my ignorance but in the 530 I don't know where to indicate the length of the connecting rod to the speed sensor. I have entered in Configuration/sensors/sensorship... but there I don't see where I should put it (I have looked in details of the sensor but I only get the ID and the Network of the sensor).

    1. You have to put the length of the connecting rod in the power measurement sensor. It doesn't matter to the speed sensor how long it is.

    1. The problem with these two is that Favero has adopted the latest ANT+ standard for cycling dynamics. However, older devices (such as the 520 and 735XT, but also the 1000 for example) do not have this update in their firmware.

  3. Thank you very much for the information in the article. I updated the assioma and in some workouts if I am recorded the data that you say and in others. I understand that it has more to do with garmin, I use a 935. During the session if I can see the metrics but only in some cases the data is uploaded to garmin connect. how can I do to always upload? Thanks 😉

  4. Hi!

    Great article!

    I just have one question: I currently ride with Garmin Edge 520, but are considering buying Favero Assioma. Is it possible to see any data from Favero Assioma on Edge 520? If so, what data is available? Didn't really understand if it was only the new features that wasn't showing, or if nothing displays at all.

    I also have a Garmin Fenix 5 series, which is compatible, but I usually don't ride with it. Of course I can use it while riding, but I think it is safer to see power data on my computer rather than my watch. For the full analysis, its fine for me to use the watch for that.

  5. I'm thinking of buying the favero assioma one, because the budget does not give for more. I think they are compatible with the polar vintage v2 and edge 530. Is it a good buy or is it a model that is going to be obsolete soon?

    1. Yes, compatible with both models. They still have a long way to go, Favero has only introduced a pedal body for Shimano on this same axle, so they will still be on sale for a long time.

  6. Good morning!
    I have thought about buying the Favero assioma one because the budget does not allow for more. Is it a good potentiometer at this time? I use a garmin 530 and a polar vantage V2 for training. I think it is compatible with both. Thank you very much

  7. Hello eduardo good morning and thank you very much for the article the first thing, I wanted to ask you, I have the Favero assioma duo and a garmin 530 and yesterday I was in the velodrome and practically do all the training sitting even so in the dynamics of cycling garmin I get that I'm almost 50% sitting / standing .... are the pedals wrong? or something in the configuration? thanks in advance.

    1. There are no settings for the cycling dynamics. Anyway it wouldn't hurt if you do a reset from the app via Bluetooth. It's something I've never seen before.

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