The Assioma PRO RS-1 is the lightest single-sided road power meter pedal on the market, weighing just 123.5 g. Built for Shimano SPD-SL cleats, it delivers professional-grade accuracy and performance—powered by a long-lasting battery that offers 60+ hours per charge with zero data dropouts. Its innovative split-body architecture keeps the electronics and battery safely sealed inside the spindle, separate from the pedal body. This design ensures IP67 waterproofing, durability, and simple maintenance. With a slim profile, +53 mm Q-factor, and 10.5 mm stack height, it’s optimized for efficiency and speed on the road. Powered by the IAV Power System, the PRO RS-1 ensures ±1% accuracy, even during sprints or with oval chainrings. It also provides a wide range of advanced cycling dynamics and integrates easily with both Bluetooth and ANT+ devices. Thanks to its modular design, the same spindle can later be upgraded to a dual-sided system or paired with MTB pedal bodies. A smart and precise tool for dedicated road cyclists seeking data-driven training and lightweight performance.
Key Features
- Right pedal without power sensor. - Fully compatible with Shimano® SPD-SL® cleats. - Lightest power meter pedal: only 123.5 g per side. - ±1% accuracy, even with oval chainrings. - Rechargeable battery with 60+ hours of runtime. - Tracks advanced cycling metrics including Platform Center Offset (PCO). - Carbon-fibre tech-polymer pedal body for strength and lightness. - Low stack height: 10.5 mm. - Standard Q-factor: +53 mm. - Modular design for easy transition between road and MTB pedal bodies. - Designed and manufactured in Italy.
Technical Specifications
- SPD-SL® road pedal with power sensor on the left side only. - Weight: 123.5 g (left pedal with sensor), 122.5 g (right pedal without sensor). - Built-in cadence sensor and gyroscope. - Power system: IAV (Instantaneous Angular Velocity-based). - Cycling Dynamics supported: Power, Cadence, PCO, Power Phase (PP), Pedal Smoothness (PS), Torque Effectiveness (TE), Rider Position. - Data transmission: ANT+ and Bluetooth. - Bluetooth shows: Power, Cadence. - Compatible with oval chainrings. - Rechargeable lithium-ion battery with 60+ hours of runtime. - Accuracy: ±1%, with thermal compensation. - Waterproof rating: IP67. - Q-factor: +53 mm. - Pedal stack height: 10.5 mm. - Compatible cleats: Included (art. 773-20-64), Shimano® SM-SH10, SM-SH11, SM-SH12. - Suitable for: Road cycling. - Made in Italy. - Warranty: 2 years
1. What is the Favero Assioma PRO RS-1? The Assioma PRO RS-1 is a single-sided SPD-SL power meter pedal that measures power from the left leg. It’s ideal for road cyclists who use Shimano-style pedals and want accurate data with pro-level reliability.
2. Is the PRO RS-1 compatible with Shimano cleats? Yes, the PRO RS-1 works seamlessly with Shimano SPD-SL cleats. No need to change your shoes or pedal system if you're already using SPD-SL.
3. Can I upgrade the PRO RS-1 to a dual-sided power meter? Definitely. You can upgrade anytime by purchasing the PRO RS-UP kit, which adds a right pedal with independent power measurement—turning it into the PRO RS-2.
4. How accurate is the power data? The PRO RS-1 uses Favero’s IAV Power system, delivering ±1% power accuracy, even with oval chainrings or high cadence shifts. It’s as precise as what the pros use.
5. How long does the battery last? It runs on a rechargeable internal battery offering over 60 hours of ride time. The charging cable uses a magnetic connector for easy and secure charging.
6. Is it waterproof and weather-resistant? Yes, the pedal is IP67 certified, making it fully protected against water, dust, and dirt. Ride confidently in any weather conditions.
7. Is installation complicated? Not at all. Just screw it in like a regular pedal. Setup is done through the free Favero Assioma app, available for iOS and Android.
8. What cycling computers and apps is it compatible with? The PRO RS-1 supports Bluetooth and ANT+, making it compatible with Garmin, Wahoo, Zwift, Strava, TrainerRoad, and most other training platforms.
9. What’s the weight and Q-factor? Each PRO RS pedal weighs just 123.5 grams and has a Q-factor of +53 mm, giving it a light and natural feel—perfect for road cyclists used to Shimano geometry.
10. Who should buy the Assioma PRO RS-1? It’s ideal for riders who prefer Shimano SPD-SL pedals, want reliable left-leg power data, and are open to upgrading to a dual-sided system later.
Assioma PRO RS-1 | Single-Sided SPD-SL Power Pedal
