The Favero Assioma PRO RS-1 is the lightest single-sided road power meter pedal on the market, weighing just 123.5 g—making it ideal for road cyclists who want precision without adding extra mass. Designed specifically for Shimano SPD-SL cleats, the RS-1 delivers ±1% accuracy, long battery life, and rock-solid stability, even during sprints, high-cadence climbs, or indoor training sessions.
Favero's innovative split-body architecture places all electronics and battery components in the sealed spindle, protecting the system from rain, pressure-washing, debris, and impacts. With IP67 waterproofing and Favero's renowned reliability, the PRO RS-1 is engineered for real-world riding conditions—not lab-perfect scenarios.
Whether you're training for power-based intervals, racing, or beginning structured training for the first time, the PRO RS-1 offers world-class sensing accuracy with future-proof upgradability: turn it into a full dual-sided system anytime using the RS-UP kit.
Who This Power Meter Is For
Perfect for road cyclists who:
Prefer the natural feel of Shimano SPD-SL road pedals
Want a lightweight and aerodynamic single-sided power meter
Need reliable data for climbing, intervals, and structured training
Use indoor platforms like Zwift, TrainerRoad, or Wahoo SYSTM
May upgrade later to a dual-sided power meter without replacing the entire system
Want accurate power numbers at an affordable price point
Key Benefits
Lightest Power Meter Pedal Available (123.5 g): Favero engineered the RS-1 to be the lightest SPD-SL power meter pedal, offering a natural road feel while minimizing rotational mass. ±1% Power Accuracy With IAV Technology: Unlike older systems that depend on cadence assumptions, IAV measures Instantaneous Angular Velocity, ensuring precision even with:
oval chainrings
uneven pedaling
standing climbs
high-cadence surges
Left-Only Power With True Pro-Level Metrics: The RS-1 provides more than basic power:
Cadence
Power Phase
Pedal Smoothness
Platform Center Offset (PCO)
Torque Effectiveness With ANT+ and Bluetooth, these integrate perfectly with all major bike computers.
Ultra-Durable Split-Body Architecture: Electronics hidden inside the spindle =
better crash protection
no exposed battery door
improved waterproofing
highly stable long-term accuracy
Upgradeable to Dual-Sided Power Anytime: Add the Assioma PRO RS-UP kit to instantly convert your RS-1 setup into a full RS-2 dual-sided power system — without buying a new pedal set. 160 Hour Battery Life With Magnetic Charging: Train longer, race harder, and charge less. No fragile ports, no water ingress — just effortless magnetic charging.
Features
Single-sided left pedal power measurement
Compatible with Shimano SPD-SL cleats
±1% accuracy guaranteed with IAV
160 hour rechargeable battery life
IP67 waterproof rating
Slim 10.5 mm stack height
Standard +53 mm Q-factor (Shimano matching)
Tracks PCO, pedal smoothness, power phase, torque effectiveness
ANT+ and Bluetooth compatibility
Modular system — upgrade to dual-sided or switch to MTB bodies
Built in Italy with pro-grade calibration and quality controls
Ready to Upgrade to Dual-Sided Power?
The Assioma PRO RS-1 is designed with future upgrades in mind. When you're ready for true left/right power balance data, you can add the Assioma PRO RS-UP Upgrade Kit ($499.33) to convert your RS-1 into a full dual-sided RS-2 system.
Why upgrade later?
Keep your existing left pedal — no need to replace it
Add independent right-side power measurement
Track true left/right balance (not estimated)
Perfect for bike fitting, injury recovery, or performance optimization
