Favero has made public their new IAV Power system.
This is an entirely new calculation algorithm for Favero and it bases power calculation on Instantaneous Angular Velocity (IAV).
Favero believes they are the only power meter pedal company currently able to deliver this calculation because of their pre-existing, inbuilt, high-precision gyroscope.
It’s a big deal.
Favero claims that IAV increases their accuracy to +/-1 % which matches the claimed accuracy of Garmin’s Vector 3 (only v3). This is an improvement from the current +/-2% accuracy of the Favero ASSIOMA (Review).
And there’s more…which should benefit many types of riders. The following types of riders with different pedalling styles and/or equipment should also see better accuracy:
- Piston-like pedal action;
- Standing on pedals when climbing; and
- Users of elliptical chain-rings of any degree of ovality (me…yay!).
These kinds of sources of error from technique or kit could equally be experienced on any kind of power meter that is located on parts that rotate with the cranks.
Many of us switched to oval chainrings to eliminate dead spots in our pedalling technique and also to get a bit of potentially, free power. From my own experience, many bike setups showed increased power. Yet was this REAL increased power or was it incorrect measurement? ie does an oval increase your recorded power by 2% but overestimate by 2% Those of you with a PowerTap G3 will, of course, know the truth either way!
The following research paper which Favero sent me, shows that one of the most oval rings available, OSYMETRIC 110mm – 50R, can lead to incorrect measurement in some circumstances of 4.5%.
Research Paper: 3mb Influence of Angular Velocity of Pedaling on the Accuracy of the Measurement of Cyclist Power
The paper also suggests circular rings could lead to a 0.5% over-estimation when climbing a 5% grade.
Perhaps also there could be a 1.5% under-estimation on indoor trainers with circular rings.
The study finds greater errors on road usage with oval rings of +2% to +4% but those same errors lessen indoors to about +1%. In my own anecdotal tests with ovals, I tentatively and conveniently found +3% errors in the middle of that range.
The document linked to above is interesting reading although I do note, “…to simulate the power applied by the cyclist with both legs, the power measured by the single pedal was doubled….“. (Doubling should be OK for this purpose if you think about it).
The theory in the document also makes sense to me...let’s see how it pans out in some tests.
Price & Availability
It’s free to existing ASSIOMA users (new users too!!) and will be available to download via the app on 2nd May 2018.
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6 thoughts on “Assioma – New V2 Firmware For Super Accuracy”
my Favero pedals show Power = 0 on my Garmin Edge 520 and also Hammerhead Karoo during the rides. May someone know how to solve the problem ?
what firmware version are you on please?
are these very short drop outs or more extended periods?
there are reports of small dropouts on WAHOO with the ASSIOMA. ASSIOMA have already fixed their end (v2.05) and wahoo are due a firmware update imminently
Hi, thx for the reply. The firmware version is 1.23. The app shows “FIRMWARE UPDATED”. Guess my app has some issue cauz the version is not up to date ?
it shouldn’t do it on theoriginal version. i used that fine for a long time
but get the firmware up to date and it might reset something. (or not)
the v2 firmware is released ‘about now’ ish.
My iTunes app is the latest. Looks like that the app can’t download the latest version. The reinstall of the app couldn’t solve the update problem. Gonna try with an android phone. Pretty nasty thing. Thx so far..
Could you please upload a SS of your app (with the version)
check the article, version is out next week i think
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