After years of rider requests and an interim workaround, Favero has officially launched a fully integrated SPD-SL-compatible power meter pedal: the Assioma Pro RS, with availability beginning later this month.
The Pro RS replaces the Duo Shi retrofit system with a complete Favero-designed pedal, while retaining cleat compatibility with Shimano’s SPD-SL system. It marks a long-awaited overhaul of Favero’s road power pedal lineup, stemming back to when it unveiled the sleeker Assioma Pro MX-2 SPD off-road power meter last year, and arguably its most competitive road product to date.
Functionally, the goal is clear: combine Favero’s proven power accuracy and its new slimmer power spindle with a Shimano-style feel and cleat compatibility. And do that without the compromises of the previous Duo Shi design, most notably its oversized Q-factor of 64–65 mm, depending on the pedal body used. We have just taken delivery of the new pedals ahead of a longer-term review. In the meantime, here’s what’s new.
What’s new?
The new road range includes three new road power meter pedal options:
- Assioma Pro RS-2: dual-sided power measurement
- Assioma Pro RS-1: left-side power only (with a non-power right pedal)
- Assioma Pro RS-UP: an upgrade spindle to convert RS-1 to RS-2
Unlike the Duo Shi, which required riders to retrofit Shimano pedal bodies onto a Favero spindle, the new Assioma Pro RS is a fully integrated, purpose-built power meter pedal. It aims to replicate the dimensions and cleat interface of Shimano’s SPD-SL system closely enough that most riders shouldn’t notice a major difference, while also resolving the ergonomic compromises of the earlier Duo Shi.
The most significant design change is the elimination of the external power pod. All electronics, strain gauges, and the rechargeable battery are now housed inside the spindle, resulting in a cleaner aesthetic, reduced size, greater compatibility, and potentially improved impact resistance (I once had the previous and more exposed version of the Assioma pod crack when struck by a stone shot up from a tyre in front).
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