Favero Assioma PRO RL Review: Lightest Look Power Meter
Favero Assioma PRO RL Review: The Lightest Power Meter for Look Pedals
When Favero launched the first Assioma in 2017, half the cycling world did a double take. An Italian company had shown that a pedal-based power meter did not have to cost a fortune. Nine years later, Favero is back with something that could shake up the top end of the market again: the Assioma PRO RL, with native support for Look Keo cleats.
The question is whether the new model is a cosmetic update or a genuine challenge to the Garmin Rally and SRM X-Power.
The lightest Look-compatible power meter on the market
The first number that jumps out of the spec sheet is 130 g, the weight of a single PRO RL pedal. For context, the Garmin Rally RK200 weighs about 163 g per pedal (326 g a pair), and the older Assioma Duo came in around 150 g. A 20 to 30 g difference per pair means little to most age-groupers, but every gram counts at the top end of the pro peloton.
Favero also dropped the stack height to 10.5 mm and set the Q-factor at +53 mm. That means fewer compromises when dialling in your position: the pedal barely changes the geometry you are used to from an old Look Keo Blade.
Accuracy and battery: Favero’s home turf
A measurement tolerance of plus or minus 1% is standard for this class. The battery life is what stands out: up to 160 hours on a full charge, which works out to four to six months for an amateur training 10 hours a week. The Rally RK200 gives about 120 hours, so Favero holds a clear edge here.
The second advantage is simultaneous connection: ANT+ plus three devices over Bluetooth at once. You can pair a Garmin watch, a tablet running Zwift and a phone running the Favero app at the same time. Few power meters offer that.
RL-1 versus RL-2: which one to buy
Favero offers two versions, and this is where the pricing catch sits.
| Model | Measurement | Best for | Price |
|---|---|---|---|
| RL-1 | Single-sided (left pedal, power estimated x2) | Amateur on one bike, budget-conscious | $649 MSRP |
| RL-2 | Dual-sided, independent left/right plus power balance | Advanced rider, triathlete, bike fitting | $999 / €710 MSRP |
If you are a triathlete planning a bike fit session, skip the RL-1. Left/right power balance, Platform Center Offset (exactly where your foot loads the cleat) and Torque Effectiveness are data a fitter needs to dial in your position on a time-trial bike. For that, the RL-2 is a requirement, not a luxury.
What about the existing Assioma?
If you already have an older Assioma Duo with Look Keo cleats built in permanently, the PRO RL is an upgrade, not a revolution. Accuracy is the same, the battery is better (160 hours versus about 50), and it is roughly 20 g lighter per pair. The main difference is that the PRO RL uses replaceable Look Keo cleats: once you wear through a set after 10,000 km, you replace the cleats instead of the whole pedal.
That is the more sustainable design. Your power meter lasts longer.
Verdict: who the PRO RL is for
Buy the RL-2 if:
- You are a triathlete with a time-trial bike and a bike fit session planned
- You want one power meter you can swap between a road bike and a time-trial bike (the Q-factor works for both)
- You need full left/right data for strength training on the bike
Keep your existing Assioma Duo if:
- Your unit still works and the battery still holds a charge
- You have no bike fit planned in the next year
- Your head unit does not support the advanced metrics anyway (Power Phase will not show regardless)
Steer clear of the RL-1 if:
- You are buying a power meter to keep for years. Estimating power from the left leg alone has limited value, especially in triathlon, where leg asymmetry increases with fatigue after the swim
Availability
DC Rainmaker published a review in March 2026. Favero still comes in well under a fully specced Garmin Rally RK200, which carries an MSRP of $1,099.99. The Italians have plenty to point to: the lightest Look-compatible pedal with a power meter on the market, the longest battery life in its class, and the best simultaneous multi-device connection over Bluetooth and ANT+.
More on this: Power Meter Pedals 2026: Four Models Compared. Racelify lists cycling events with dates and organiser links.