Same dual-sided power measurement, different cleats, battery and build.
Verdict
Buy the Assioma DUO if you ride Look Keo-style cleats and want accurate dual-sided power for the least money. Buy the Assioma PRO RS-2 if you ride Shimano SPD-SL cleats, want roughly three times the battery life and a modular pedal body you can swap. Both quote the same plus or minus 1 percent accuracy, so the choice is mostly cleats and convenience.
| Favero Assioma DUO | Favero Assioma PRO RS-2 | |
|---|---|---|
| Sensing | Dual-sided | Dual-sided |
| Cleat system | Look Keo compatible | Shimano SPD-SL compatible |
| Accuracy (per Favero) | Plus or minus 1 percent | Plus or minus 1 percent |
| Battery life | At least 50 hours | At least 160 hours |
| Charging | Magnetic connectors, micro-USB cables | Magnetic connectors, USB-C cable |
| Design | Compact, sealed sensor block | Modular spindle, swappable pedal body |
| Connectivity | Bluetooth and ANT+ | Bluetooth and ANT+ |
The table compares the Favero Assioma DUO and PRO RS-2 on sensing, cleats, accuracy, battery, charging and design; both are dual-sided pedal power meters, and the PRO RS-2 adds SPD-SL compatibility, longer battery life and a modular body. Specs are from the Amazon listings.
You use Look Keo-style cleats, you want accurate left and right power without paying for the PRO features, or you move the pedals between road bikes and charge them after every few rides.
Check Favero Assioma DUO on Amazon
You ride Shimano SPD-SL cleats, you dislike charging often, or you want a modular spindle so the same sensor can move between road and mountain pedal bodies.
Check Favero Assioma PRO RS-2 on Amazon
Skip both if you only train indoors (a smart trainer already measures power) or if you are on a tight budget; a single-sided power meter costs less and works well for training load and pacing.
Both measure power in each pedal. The DUO uses Look Keo style cleats and lasts at least 50 hours per charge, while the PRO RS-2 uses Shimano SPD-SL cleats, lasts at least 160 hours and has a modular pedal body.
If you ride SPD-SL cleats it is the natural choice, and the longer battery life means less charging. If you already use Look Keo cleats, the DUO gives the same accuracy for less.
Dual-sided pedals measure each leg directly, which is useful if your left and right outputs differ. Single-sided pedals measure one leg and double it, which is fine for most training.
Yes. They connect over Bluetooth and ANT+, so they work with most bike computers, apps and smart trainers.
Comparison researched from published manufacturer specifications, retailer listings and owner reviews. We have not tested these products side by side. Confirm current prices and specifications before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Choosing between models? See Favero Assioma DUO vs Garmin Rally RK210, Favero Assioma UNO vs DUO.