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Assioma PRO RS-2 Power Meters

Assioma PRO RS-2 Power Meters

Regular price $785.00 USD
Regular price Sale price $785.00 USD
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Favero Assioma PRO RS-2 Power Meters

Assioma PRO RS is the lightest road power meter pedal available, with just 123.5g per pedal.
Compatible with Shimano® SPD-SL® cleats, it delivers pro-level performance and over 60 hours of use per charge—no power dropouts.

The power spindle, which safely houses all the important electronic parts and battery, is completely sealed and independent from the pedal body. This so-called “split approach” makes it durable, and extremely easy to maintain.

Its sleek design, with a Q-factor of just +53mm and a stack height of 10.5mm, makes it perfect to improve performance and achieve results on your road training.

The Assioma PRO RS power meter offers ±1% accuracy thanks to the IAV Power System, and the most complete power data reading available with a wealth of advanced metrics. A modular design lets you switch between road and MTB bodies while keeping the same power sensor.

The best power meter pedal to train with precision and ride with confidence.

MAIN FEATURES

  • Left pedal with power sensor
  • Right pedal with power sensor
  • 100% Shimano® SPD-SL® cleat compatibility
  • Lightest power pedal – Just 123.5 g per side
  • ±1% power accuracy even with oval chainrings
  • Rechargeable battery – 60+ hours per charge
  • Advanced cycling metrics (PCO included – Platform Center Offset)
  • Pedal body in carbon-fibre tech-polymers
  • Low stack height (10.5 mm)
  • Standard q-factor (+53mm)
  • Modular design – interchangeable pedal bodies (road/MTB)
  • Made in Italy

TECH SPECS

  • SPD-SL® road power pedals with power meter on both sides
  • Weight per power pedal: 123.5 g
  • L/R Balance
  • Cadence sensor: included, built-in
  • Gyroscope: included, built-in
  • Power calculation system: IAV (Instantaneous Angular Velocity-based)
  • Cycling Dynamics: available
  • Data visible via ANT+ or on the Favero Assioma app: Power, Cadence, L/R Balance,
  • PCO, Power Phase (PP),  Pedal Smoothness (PS), Torque Effectiveness (TE), Rider Position
  • Data visible via Bluetooth: Power, Cadence, L/R Balance
  • Oval-chainrings compatible: Yes
  • Battery type: rechargeable, lithium-ion
  • Battery life: at least 60 hours
  • Radio communication: ANT+, Bluetooth
  • Accuracy power measurement: ± 1%
  • Thermal compensation: yes
  • Waterproofness rating: IP67
  • Q-factor: +53mm
  • Pedal stack height: 10.5 mm
  • Compatible cleats: Provided cleats (art. 773-20-64),  Shimano® SM-SH10, SM-SH11 or SM-SH12
  • Bike types: road cycling
  • Warranty: 2 yrs

PACKAGE CONTENTS

  • Power meter with sensors on both sides
  • Two-way charging cable
  • 2 Magnetic connectors
  • Shimano® compatible SPD-SL® cleats
  • 4 Washers
  • Greasing tools kit
  • Warranty and safety manual
  • Welcome flyer
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Ready to learn more?

Frequently Asked Questions

How often should I re-test my FTP and set up my power training zones again?

Your FTP, or Functional Threshold Power, is key for setting your personal power training zones. As you train more and get fitter, your FTP will likely go up. Most people should re-test their FTP every 4 to 8 weeks. This is extra helpful during periods of focused structured training. Testing often makes sure your power training zones are correct for how fit you are right now. This helps you train smarter and ride better.

Besides just how many watts I produce, how else can things like left/right balance help my cycling?

Knowing your watts tells you your total power. But some cycling power meters give you more helpful details, called advanced metrics. Your left/right balance shows if one leg is working harder than the other. If they are very uneven, it could make you less efficient or even cause injury. Seeing this helps you work on pedaling more evenly. Other stats, like pedaling dynamics, show how smoothly you push the pedals. These details can help you pedal better and boost your performance.

What are the key factors to consider when choosing a cycling power meter?

When selecting a power meter, consider accuracy, battery life, compatibility with your bike, ease of installation, and your budget. Also think about whether you need single-sided or dual-sided measurement, and which data metrics are most important for your training goals.

If I'm new to using power, which kind of cycling power meter (like pedal, crank, or spider) is good to start with?

For a beginner, the best cycling power meter often depends on your bike and what you want to spend. Pedal-based power meters are easy to move between different bikes. This makes them a good choice if you ride more than one bike. Crank arm-based power meters (especially ones that measure just one side) can cost less. Spider-based and hub-based systems are more built-in but might only fit certain bike parts. Think about how easy it is to put on your bike, if it works with your bike parts, if you want left/right balance data, and the price when you decide.

Can you show me a simple way to use power, heart rate and RPE together on a training ride?

Yes! Let's say you are doing intervals where you ride hard for short times, aiming for your Threshold zone (Zone 4). You'll use your power meter to stay in the right range of watts for that zone. Watch your heart rate too. If it's much higher or lower than normal for that power, you might be tired, low on fluids, or stressed. Also, use RPE (Rate of Perceived Exertion), which is how hard the effort feels to you. If the effort feels much harder than usual for that power and heart rate, something else might be affecting your ride, like poor sleep. Using all three together gives you a clearer picture of how your body is doing during training.

How do pedal-based power meters compare to crank-based systems?

Pedal-based power meters like the Favero Assioma Duo offer easy installation and transferability between bikes, while crank-based systems like the 4iiii Precision 3+ typically provide longer battery life and add less weight. Pedal systems often offer dual-sided measurement, while some crank systems only measure one side.

Are cycling power meters worth the investment for amateur riders?

Power meters can be valuable for amateur riders serious about improving their performance. They provide objective data on your effort and progress, allowing for more structured and effective training. However, casual riders may find heart rate monitors sufficient for their needs.

What level of accuracy can I expect from a modern cycling power meter?

Most high-quality power meters today offer accuracy within ±1-2% of actual power output. Some specialized units like the Verve InfoCrank Classic claim even higher precision. For most riders, accuracy within ±2% is more than adequate for effective training.

How does battery life vary between different types of power meters?

Battery life can vary significantly between power meter types. Pedal-based systems typically offer 50-120 hours per charge, while some crank-based systems like the 4iiii Precision 3+ boast up to 800 hours of battery life. Consider your riding habits and charging preferences when evaluating battery performance.