Power sensor
The ultimate tool for progress
Why use a power sensor?
The interest goes far beyond the simple display of numbers on a counter.
- Surgical precision: You measure what you really produce, without latency. It's the ideal tool for short split sessions.
- Endurance management : By knowing your power zones (FTP), you can manage your energy during climbs or long outings to avoid "hunger pangs".
- Training load monitoring : You can precisely analyze your fatigue and your progress over the months, so that you arrive in good shape on the day of your goal.
- Pedaling balance : Dual" models (measurement on both legs) allow you to analyze your left/right leg balance and the efficiency of your pedaling technique.
Discover our panorama of market leaders: Favero, Garmin and challenger Wahoo.
The choice of pure performance
Favero Assioma
The Assioma is the market benchmark for its unbeatable reliability/price ratio.
- Highlights : Extreme accuracy (±1%), integrated gyroscopes for accurate measurement even on hilly terrain, and rechargeable via magnetic connector (no need to change battery).
- Key models : L'Assioma DUO (bilateral measure) for competitors and theAssioma PRO MX for those who want the same precision on their mountain bike or gravel bike (standard Shimano SPD).
- Verdict: Ideal for the discerning cyclist who wants a reliable tool with no aesthetic frills.
Versatility without limits
Garmin Rally
Garmin has designed an interchangeable "pedal body" system, allowing you to switch from one standard cleat to another without changing the electronic axle.
- Highlights : Complete ecosystem, seamless integration with Edge computers and advanced physiological measurements (Cycling Dynamics). The models RS are for Shimano SPD-SL shims. RK for Look KEO, and XC for mountain biking.
- Key models : RS200 (double measurement) or RS100 (single-measure, scalable).
- Verdict: The choice for those who own several bikes (Road and Gravel) and want an ultra-complete data ecosystem.
Speedplay ergonomics
Wahoo POWRLINK ZERO
Wahoo has integrated power technology into the famous Speedplay pedal, renowned for its double-sided engagement and precise angular freedom settings.
- Highlights : The world's only power pedal with double-sided engagement. Native connection with KICKR home trainers and ELEMNT meters creates a seamless user experience.
- Key models : POWRLINK ZERO Dual-Sided for a complete analysis or Single-Sided for more affordable access to power.
- Verdict: Indispensable for Speedplay enthusiasts and loyal users of the Wahoo ecosystem.
Frequently asked questions
Should I choose a single or dual measurement?
A simple measurement (left side only) multiplies the value by two to give the total power. That's enough to get you started. Dual measurement is crucial if you have a muscular imbalance, or if you want to optimize your pedaling technique by analyzing torque efficiency.
What is the average autonomy of these pedals?
The Favero range offers 50 hours (rechargeable). Garmin Rally models go up to 120 hours (button cell batteries). The Wahoo POWRLINK range features approx. 75 hours (rechargeable).
Can I install my pedals on any bike?
Yes, that's the major advantage over a sensor in the crankset. A pedal thread is universal. You can switch them from your road bike to your home trainer in seconds with a 15 mm wrench or an 8 mm Allen key.
Does the weight of the pedals make a big difference to the feel of the ride?
The weight increase is minimal (around 30 to 60 g per pair compared with top-of-the-range pedals without sensors). For 99% of cyclists, this extra weight is negligible compared with the training data.
Do you need to calibrate your sensor for each output?
It is recommended to perform a "Zero Offset" via your meter at the start of each outing, especially if the temperature has changed significantly since the previous day. This guarantees a constant accuracy of ±1%.
Are these pedals water-resistant?
All these models benefit from IPX7 certification. They are designed to withstand outings in pouring rain and water-jet cleaning (without direct high-pressure on the seals).
What's the difference between "Instantaneous power" and "3s power" on my meter?
Instantaneous power fluctuates enormously with each pedal stroke, making it difficult to read. By displaying the "3s Power" (smoothed average over 3 seconds), you get a stable value that's much more useful for managing your pace.
Which pedal should you buy?
Reason's choice: Favero Assioma
It's the choice of the pragmatic cyclist. If you're looking for the most reliable precision on the market at the right price, look no further.
- For whom? Competitors and cyclists who want a tool that's indestructible, easy to recharge like a smartphone, and who don't want to pay for superfluous design.
- The board: Opt for Assioma DUO if you're preparing precise objectives, bilateral measurement is a real plus for analysis.
Ecosystem choice: Garmin Rally
This is the solution for those who want total integration and don't want to be limited by a single shim standard.
- For whom? Users already equipped with an Edge computer or Fenix watch who wish to exploit Cycling Dynamics (analysis of sitting/dancing position, etc.). It's also the only viable choice if you alternate between road (Shimano/Look cleats) and Gravel/MTT (SPD cleats) thanks to interchangeable pedal bodies.
- The board: Take the Rally RS200 (Shimano) or RK200 (Look) if you have several bikes with different pedals.
The ergonomic choice: Wahoo POWRLINK ZERO
This is the choice of Speedplay purists and fans of the American brand.
- For whom? Cyclists with knee problems or who require millimetric angular freedom, as well as those who appreciate double-sided engagement (very practical in town or during criteriums). If you already have a KICKR Home Trainer, data consistency will be perfect.
- The board: Choose model Dual-Sided for a complete measurement, especially if you're already using classic Speedplay, the transition will be seamless.
Our final verdict:
- You want the best quality/price/reliability ratio ? Go to Favero.
- You want versatility and a complete ecosystem ? Go to Garmin.
- You swear by theSpeedplay ergonomics ? Go to Wahoo.
