Assioma Duo
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Across dozens of long-term tests and multi-year owner reviews, the Assioma Duo has earned a near-universal consensus as the best-value dual-sided power meter you can buy — Cycling Weekly ranked it #1 overall in 2026, CyclingArchives awarded 9.4/10 after 4,650 km, and Cyclingnews gave it five stars after 3,188 km.
- Accuracy: Repeatedly verified to ±1% across indoor and outdoor conditions, benchmarked against SRM, Verve Infocrank, Quarq, Wahoo Kickr, and Elite Direto X — results are consistently "bang-on" across the field.
- Value vs. competitors: At $499 (current street price), it costs roughly half the Garmin Rally RS200 and Wahoo Powrlink Zero for equivalent dual-sided accuracy; DC Rainmaker and In The Know Cycling both flag this as the decisive factor for most buyers.
- Cleat system lock-in: Every reviewer surfaces the same issue — Look Kéo compatibility only in the base Duo; Shimano SPD-SL riders must buy the separate DUO-Shi spindle kit, which adds cost and widens Q-factor by ~13mm per side.
- Long-term durability: A 2.5-year, 10,000-mile owner review (Triathlon Dan) and a 7-year Cycling Weekly long-termer both report zero electronics or battery degradation, which is notably stronger than crank-based alternatives.
- Reviewer disagreement on the newer PRO RS: BikeRadar and CyclistsHub note the Assioma PRO RS largely supersedes the Duo by eliminating the external spindle pods — the Duo remains the call only if saving ~$300 matters more than aesthetics.
Skip if: you're already deep in a Shimano SPD-SL setup across multiple bikes and unwilling to run the DUO-Shi conversion or tolerate the wider stance width.
- performance
How accurate are the Favero Assioma Duo pedals?
Independently verified at ±1% or better across multiple tests. A 2026 peer-reviewed study found a mean error of just 0.7% vs. a calibrated ergometer, and numerous reviewers testing against Quarq, SRM, Wahoo Kickr, Tacx Neo, and Elite Direto found readings within 1–2% across all power ranges.
- components
How long does the battery last, and is it replaceable?
Favero claims 50+ hours; real-world tests consistently match or exceed this (reviewers logged 51–55 hours). The battery is NOT user-replaceable — it is welded in place under waterproof resin — but is rated to retain 80% capacity after 500 charge cycles (~25,000 hours of total life). Charging both pedals simultaneously takes about 2.5 hours via a magnetic USB cable.
- value · price
Is the Assioma Duo worth the price compared to Garmin Rally RS200 or Wahoo Powrlink Zero?
Yes, for most buyers. The Duo costs roughly $499–$760 depending on source/date, versus ~$1,100 for the Garmin Rally RS200 dual and ~$1,000 for Wahoo Powrlink Zero dual — similar accuracy at 35–50% less. The main trade-offs are a rechargeable (non-swappable) battery vs. Garmin's replaceable AAA cells, and no Platform Center Offset metric. Reviewers unanimously call the Assioma the best price-to-performance value in the category.
- use case
How easy is it to install and swap between bikes?
Extremely easy — reviewers describe installation as a 20-second-per-pedal hex wrench job, with total setup (firmware check, pairing, calibration) taking under 20 minutes. Swapping bikes requires only unthreading the pedal, threading it onto the new bike, and performing a zero offset. You must register the pedals via the Favero app before first use or they won't transmit data.
- durability
How durable are they over years of real-world use?
Exceptionally durable. Multiple long-term owners report zero electronic issues after 4–7 years of use, with battery performance still near claimed capacity. One reviewer replaced bearings once after 10,000+ miles (~£30, straightforward DIY). They are IP67 waterproof, and the pedal body is replaceable (~$50–$58) if damaged without affecting the sealed power unit.
- fit · sizing
Do the Assioma Duo work with Shimano SPD-SL cleats, or am I locked into Look Keo?
The standard Assioma Duo uses Look Keo-style cleats only. If you want Shimano SPD-SL compatibility, you need the Assioma Duo-Shi spindles (~$589), which fit into compatible Shimano pedal bodies (R540 through R8000 Ultegra, but NOT current Dura-Ace). The Duo-Shi adds 11mm of Q-factor (65mm vs. 54mm), which some riders notice. You cannot convert existing Duo spindles to Shimano — the Duo-Shi requires a different factory calibration.
- known issues
What are the known issues or complaints about the Assioma Duo?
The most consistent criticisms across reviewers are: (1) the external spindle pods look clunky and can rub wide feet; (2) the included Xpedo/Favero cleats are harder to clip into and slippery when wet — most reviewers recommend buying genuine Look Keo cleats; (3) the Look Keo cleat system offers less fore-aft adjustability than Shimano SPD-SL; (4) the battery is non-swappable (rechargeable only); and (5) advanced Cycling Dynamics metrics (including Platform Center Offset) are only fully visible on Garmin head units.
- use case
Do the Assioma Duo work well for indoor training on Zwift or with a smart trainer?
Yes. The pedals broadcast simultaneously on both ANT+ and Bluetooth Smart, making them fully compatible with Zwift and all major indoor apps. Multiple reviewers tested them against Wahoo Kickr, Tacx Neo, and Elite Direto trainers and found power readings virtually identical, typically within 1–2 watts over sustained efforts.
What reviewers actually said
The Assioma DUO sits at $499 USD / €499 EUR in May 2026, which is roughly 35% cheaper than Garmin's Rally RS200 and 40% cheaper than Wahoo's Powrlink Zero.
The most notable change compared to Favero's existing (and highly rated) Assioma Duo pedals is the lack of pods on the spindles.
The Favero Assioma Duo pedals weigh a relatively scant 300g per pair (150g per pedal).
The pedals cost £639 / €695 / $815. That's very competitive for a true dual-sided power meter. They also promise +/- 1 per cent power accuracy, and 50 hours of use from an internal, rechargeable battery.
The fact that the Favero Assioma power meter pedals are rechargeable puts them a step ahead of Garmin, even before we consider their accuracy and durability.
Price: US$664 / AU$1,100 (Duo version, as tested).
These retail about 600 pounds which is about 700 [dollars]... the uno's the one-sided power measurement pedals retail between 150 to 200 pounds cheaper than these so between 350 and 400 pounds.
Favero Assioma DUO scoring: Accuracy 5/5 | Reliability 5/5 | Ease of Installation 5/5 | Battery Life 2/5 | Price 3/5 | WEIGHTED OVERALL SCORE 4.4/5
How it compares
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