Favero Assioma PRO RS review: the best power meter pedals available for road bikes

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Favero’s Assioma PRO RS is the best power meter pedal for road bikes available today.

Built around the same technology as the Assioma PRO MX off-road pedals, the Assioma PRO RS pedals offer the same refined form factor as well as reliable and consistent data accuracy.

Better yet, they’re also lightweight, easy to use and priced competitively at £649 / $789 / €699 for the dual-sided version, with single-sided sets also available.

The lack of an option for Look Keo-compatible pedal bodies might be disappointing for some, but if you’re happy using Shimano’s popular SPD-SL cleat system, the Assioma PRO RS pedals offer flawless performance in practically all areas.

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Favero Assioma PRO RS specification

As noted in our first look at the Favero Assioma PRO RS pedals, the most notable change compared to Favero’s existing (and highly rated) Assioma Duo pedals is the lack of pods on the spindles.

This has been achieved by using the same technology as on the Assioma PRO MX off-road pedals, which sees all of the electronics housed within the pedal spindle.

In one fell swoop, this ‘fixes’ the only real fault I could find with Favero’s original Assioma Duo pedals. It’s fair to say the pods didn’t affect performance, but they certainly didn’t look amazing.

Ditching the pods also brings the Assioma PRO RS pedals in line with the sleek aesthetics of Favero’s closest rivals, Garmin’s Rally system and Look’s Keo Blade Power.

The only compromise arising from the pod-less design is the need to install the pedals using a 15mm pedal spanner, rather than an 8mm Allen key / hex wrench – as the room previously reserved for the Allen key slot is now put to use.

As we’ll talk about in the next section, though, that’s no big deal in my experience.

Favero claims a key aspect of its design is that the spindle is fully sealed for better weather resistance and durability. This means charging the pedals or removing the pedal bodies doesn’t expose any electronics to the elements, and there’s no chance of mis-threading or damaging a battery door (as is too often an issue with power meters).

The composite pedal bodies themselves feel high-quality, and at 250g for the set (SPD-SL cleats and hardware add an additional 72g) they are the lightest power meter pedals you can buy.

In contrast to the Assioma Duo pedals, which used Look Keo-compatible pedal bodies, the Assioma PRO RS pedals use Shimano SPD-SL-compatible pedal bodies.

Unfortunately, whereas Garmin offers both SPD-SL and Look Keo pedal bodies, there isn’t a Look Keo option for the Assioma PRO RS pedals.

While I believe Shimano SPD-SL is a superior cleat system to the Look Keo (thanks to its larger platform and adjustment range), it’s nevertheless a shame to not give riders a choice in this regard.

I tested the dual-sided version – the Assioma PRO RS-2 – which costs £649 / $789 / €699, but single-sided pedal sets are also available for £399 / $499 / €439.

As with other single-sided power meters, the Assioma PRO RS-1 measures power output from one leg only (the left, in this case) and doubles it to estimate your total power output. 

Dual-sided sets measure the power output of both legs independently, combining both to show your total power output.

Upgrade kits for converting single- to dual-sided pedals are also available for £389 / $489 / €429.

Compared to the competition, the Assioma PRO RS pedals are among the cheapest dual-sided power meter pedals available.

Garmin’s existing Rally RS200 pedals cost £769.99 / $1,099.99 / €899.99, for example, while its recently announced Rally RS210 pedals are even more costly, at £929.99 / $1,199.99 / €1,099.99.

Look’s Keo Blade Power pedals cost £899.99 / $1,070 / €999.

The closest competitor in terms of price is Wahoo’s Powrlink Zero, which costs £679.99 / $849.99 / €799.99.

While I found the Powrlink Zero pedals to deliver accurate data and competitive battery life, it’s worth remembering they’re only compatible with Speedplay cleats, and feature similar spindle pods to Favero’s older Assioma Duo pedals.

As for everything else, the key specs for the Assioma PRO RS pedals and its key competitors are as follows:

Favero Assioma PRO RS installation and setup

The Favero Assioma PRO RS pedals are installed using a 15mm pedal spanner.

As with all power meters, best practice is to use a torque wrench – so you’ll need a crowfoot spanner and a torque wrench capable of tightening the pedals to between 30 and 40Nm.

Before you can connect the Assioma PRO RS pedals to your bike computer and start riding, you’ll need to activate them via Favero’s Assioma app (available for iOS and Android), which also activates the pedal’s two-year warranty.

At this point, it’s a good idea to check the pedals have the latest firmware available, and to set the correct crank length for accurate power measurement (the latter can also be done via a compatible bike computer).

Transferring the pedals between bikes is pain-free, you just need to ensure they’re installed to the correct torque and crank length.

Due to the revised spindle shape, the Assioma PRO RS pedals use a different magnetic charging head from the Assioma Duo pedals, but it’s the same as the Assioma PRO RX and has been updated to be USB-C compatible.

As with Garmin’s Rally system, it’s also possible to swap the pedal bodies between those compatible with 3-bolt SPD-SL road cleats and 2-bolt cleat SPD off-road cleats.

In this case, though, the process is far simpler. While the Garmin Rally system requires fiddling with some tiny screws and a thin-walled socket wrench (among other things), Favero’s Assioma PRO pedal bodies require only a 6mm Allen key, a 15mm spanner and a torque wrench.

This is ideal if you want to use the same power meter across both road and gravel bikes, for example, but don’t want to use road pedal bodies and shoes off-road.

Replacement pedal bodies are also relatively cheap, at $69.99 / €49 each or $139.98 / €98 a set. In contrast, Garmin Rally pedal bodies start at £219.99 per set.

All that said, it’s worth noting Garmin says the process for its recently launched Rally 210-series pedals is much simpler and will require only a pedal spanner and a 5mm Allen key.

Replacement pedal bodies are still significantly more expensive than Favero’s, though, at £219.99 for SPD-SL- or Look Keo-compatible versions, or £349.99 for SPD-compatible sets.

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Favero Assioma PRO RS performance

On the bike, The Favero Assioma PRO RS pedals function just like a standard Shimano SPD-SL pedal, except you get power data at your head unit.

Clipping in is reassuringly snappy and the pedals spin a little less freely on the spindles compared to the Assioma Duos, which means there’s less chance of sending it spinning if you tap the pedal with your foot.

The integrated wear plates aren’t replaceable, but have held up well over testing. In any case, if the pedal body wears out over time or gets damaged, replacements are cheap and easy to swap in.

I also appreciate that the release tension is adjustable on the Assioma PRO RS pedals – something the Keo Blade Power pedals forgo (where changing the release tension requires purchasing ‘softer’ blades, for £40 / $40 / €40 per set).

The claimed 60 hours of battery life also chimed with my experience.

While that’s half the 120 hours of battery life offered by Garmin’s Rally system, I prefer the rechargeable and fully sealed design. Not only does it mean you save money on buying batteries, but it also does away with a potential weak point for water ingress.

It’s fair to say I haven't experienced water ingress with Garmin’s Rally pedals specifically, but battery-door issues initially plagued the brand’s previous Vector 3 pedals, while 4iiii’s Precision 3+ Pro power meter crankset showed such problems aren’t entirely a thing of the past yet.

Like the other Assioma pedals, the Assioma PRO RS pedals have shrugged off rainy rides and post-ride hose downs without trouble, and I expect them to last a long time if well looked after.

As noted in my Assioma PRO MX review, I’ve been using a set of Assioma Duo pedals since mid-2020, and they’re still going strong with no issues.

Favero Assioma PRO RS data accuracy

This section will be short, because as with the Assioma PRO MX pedals and the Assioma Duo pedals before them, the Assioma PRO RS pedals delivered accurate and consistent data throughout testing.

Up against benchmarks such as 4iiii’s Precision 3+ Pro and Tacx’s Neo 3M smart trainer, the Assioma PRO RS pedals performed flawlessly, with no drop-outs or quirks.

How useful all of the advanced metrics, such as power phase, platform centre offset, and so on, are is debatable, but they’re nice to have if you’re a data geek.

Favero Assioma PRO RS bottom line

Favero continues to impress with its latest power meter pedals.

The Assioma PRO RS pedals tick all of the right boxes, offering accurate and reliable power measurement, class-leading specs, a highly refined form factor and a price that undercuts the competition.

The only notable compromise is that there’s no option for riders who prefer Look Keo cleats. 
But if you’re happy with Shimano’s SPD-SL system – as I suspect most will be – the Assioma PRO RS power meter pedals are comfortably among the best power meters available.

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