Favero Assioma DUO-shi SPD-SL confirmed for July 2021 – kinda

FTC: Affiliate Disclosure: All links pay commissionReading Time: 3 minutes
Favero Assioma DUO-shi
Shimano-compatible Pedal Body?

Information here is all public record: as on dcrainmaker.com, Instagram and trainerroad.com

Favero Assioma DUO-shi SPD-SL (shi=Shimano)

Back in February 2021, an eagle-eyed visitor to the Favero website spotted the following information which confirmed that a new Shimano cleat-compatible power meter was on the way from Favero and it seems to have the name Favero Assioma DUO-shi. That leak was reported on TrainerRoad at the time.


I asked Favero about this in February and they weren’t keen on making any announcements until ‘later in the year’. Well, we now have confirmation from their Instagram page that the new Assioma is due next month.



The question then remains, “Is this simply a new pedal body on a very similar-looking axle, or are there new electronics inside with more, new capabilities?

Firstly the name implies it’s very much the same product. The original Favero power meter was the BePro and then came Assioma. The name Assioma DUO-shi sounds almost like an afterthought rather than the third generation of Favero awesomeness. And their products ARE awesome. When the Assioma was released in 2017 it was pretty obvious to me that it was the best and cheapest PM pedal on the market at the time (it probably still is) and I still prefer it over some of the dubious iterations Garmin have made to Vector. Assioma already has pretty much every accuracy and performance characteristics you’d need. In fact, really the only gripes with Assioma are a lack of Shimano SPD-SL compatibility and a slightly large hub that buts onto the crank and mostly doesn’t look as nice as the Garmin Vector.

Now, if you look at the SHIMANO ROAD image above you can see that the hub looks unchanged. However, I’m holding my Assioma pedal up against that image on the screen right now and the proportions of the hub in the image DO look different. More precisely the new hub does look a bit smaller...I could be wrong. A smaller hub would be great as it would give a little more clearance for more unusually proportioned shoes.

However, a smaller hub would also imply a smaller battery and smaller battery life…other things being equal. Which they aren’t. Battery tech has moved on considerably in the last 4-5 years and I would expect Favero could give us more battery life from a physically smaller battery. My best bet, based on no inside intel, is that this is precisely the case.

Take Out: Favero will release the Assioma Duo-Shi SPD-SL pedal meters in July 2021, there will be at least a single-sided and dual-sided model and the electronics might have changed but the only material electronic differences would be a better battery life. I doubt there will be an SPD-SL upgrade kit for existing Assioma users…but could be wrong.


Q: Am I excited?

A: Yes! I have recently stopped using the Assioma solely because I was getting fed up with the LOOK cleats. If the Shimano SPD-SL cleats are brought back into the mix then that’s a GREAT reason to start using Favero again.


Must Read: Detailed Favero Assioma Duo Review (2017)

Or here’s the summary version…

Long Term Review - Feedback
  • Price - 95%
  • Apparent Accuracy - 95%
  • Build Quality & Design - 95%
  • Features, Including App - 95%
  • Openness & Compatability - 95%

Assioma Longerm Review - Summary

Favero Assioma Review Favero Assioma Duo Uno Power Meter PedalI’ve used my Favero ASSIOMA Dual pedals as my main power meter over many thousands of miles. I’ve done an Ironman, several HIMs, the Alps (well some of it), the Pyrenees (well some of it), TTs and faffed around my local park many, many times. I’ve used them for trail rides, I’ve used them in the rain. I’ve used them a lot, they’ve not once let me down.

I’ve changed them from bike-to-bike, when needed, in less than 5 minutes each time and I’ve never run out of juice. I’ve never had problems pairing them to anything or calibrating. They look good.

Favero has added some sweet little firmware upgrades over the last couple of years with an accuracy update that matches the best-claimed accuracy from all other pedal power meter solutions and that was followed by the introduction of the more advanced Garmin Cycling dynamics metrics (except PCO).

They’re not perfect but they are one of the most reliable bits of kit I’ve got, which is unexpected when you think of the knocks and suchlike that a pedal can get.

Are they the most expensive power meter pedals?…nope. They’re one of the cheapest and CERTAINLY (IMHO) the best value-for-money. As of June 2021, you can get some good discounts if you shop around the specialist PM companies at this link.

Other than making them a bit smaller around the hub, I can’t really see how any improvement would materially change how much I like them.

This is definitely a product you will end up recommending to all your mates…I did.




  • Kinda just ALWAYS works
  • At least as accurate as all other PM pedals…or, indeed, as accurate as ALL PMs.
  • Nice looking
  • Cost-effective
  • Sturdy
  • Easy to change between bikes…literally like changing a pedal with a hex wrench 😉
  • Dual-channel BLE and ANT+ works with anything
  • Simple to calibrate before each ride..takes 10 seconds and ALWAYS zero offsets correctly
  • Jul 2021 – now comes with a Shimano pedal option


  • Earlier versions were hard to unclip but the current version allows for looser pedal tensioning
  • Can be hard to clip IN. This is because the pedal could be better-weighted and spin around less than it does.
  • Needs a shim when I use my Pyro platforms which is annoying as I haven’t got a shim (Edit…I have now)
  • I am not convinced that the results with elliptical chainrings are correct, despite 3rd party studies. Power readings seem higher with ellipticals on my TT bike.
  • I’d prefer the ‘hub’ to be smaller for aesthetics and it also affects the Q-factor tho I’m not too bothered about that.



Reader-Powered Content

This content is not sponsored. It's mostly me behind the labour of love which is this site, meaning it's entirely reader-powered content ❤️ I'd really appreciate it if you'd follow, subscribe or Buy Me A Coffee ❤️ Alternatively please buy the reviewed product from my partners (which costs you no extra) and, for that, I receive a small commission. Thank you! FTC: Affiliate Disclosure: All links pay commission. As an Amazon Associate I earn from qualifying purchases.

2 thoughts on “Favero Assioma DUO-shi SPD-SL confirmed for July 2021 – kinda

  1. I still hope for a SPD compatible PM from them….or at least something like the modular Garmin system, where this new axle can be put to Shimano SPD XC/gravel pedal bodies 🙂

    1. yes i think RALLY stole a march on that one. it’s a smaller market but if you get nearly 100% of it (Garmin) you’re laughing as it’s still a reasonable -sized market.
      hopefully favero had spd in mind when they designed it..tho, iirc, it is possible to change the existing pedal body. i think gplama showed that tho I’m not sure if that was for spd or spdsl

Leave a Reply

Your email address will not be published. Required fields are marked *