Assioma Duo

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.

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.

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.

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.

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.

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.

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.

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.