A lightweight, SPD-SL®- compatible road power meter built around Favero’s sealed PRO spindle. The RS-1 measures power on the left pedal only, delivering ±1% accuracy, a low 10.5 mm stack height, and a +53 mm Q-factor for a familiar Shimano-road feel, perfect for hot-weather training and fast group rides. Upgrade anytime to dual-sided with the RS-UP kit.

Highlights

- Single-sided measurement: Left pedal with sensor; right pedal without. Simple upgrade path to dual-sided via RS-UP.-IAV Power System (±1%): Instantaneous Angular Velocity-based calculations keep accuracy even with oval chainrings and irregular pedal strokes.
- Compact & light: About ~124 g per pedal (≈246 g per pair), 10.5 mm stack, +53 mm Q-factor.
- Advanced metrics: Supports Cycling Dynamics such as PCO, Power Phase (PP), Pedal Smoothness (PS), and Torque Effectiveness (TE) over ANT+ / Favero app. (Note: single-sided units estimate balance; true L/R requires RS-2.)
- Sealed, rechargeable design: IP67 protection and magnetic charging reduce dropouts versus coin-cell designs.
- Shimano® SPD-SL compatibility: Works with SM-SH10/11/12-style cleats; one set included.

Specifications

- Model: Assioma PRO RS-1 (left pedal with sensor; right pedal without)
- Weight: ~123.5–124.8 g per pedal (pair ≈ 246–247 g)
- Accuracy: ±1% with active thermal compensation; IAV power calculation
- Metrics via ANT+ / Favero app: Power, Cadence, PCO, PP, PS, TE; rider-position metrics on compatible head units.
- Metrics via Bluetooth: Power, Cadence (multi-channel BLE supported)
- Connectivity: ANT+ and Bluetooth Smart; magnetic USB-C charging puck
- Battery: Rechargeable Li-ion, 60+ hours per charge
- Waterproof: IP67
- Stack height: 10.5 mm; Q-factor: +53 mm
- Cleats: Compatible with Shimano® SM-SH10/11/12; cleats included in most bundles
- Operating temp: −10 °C to +55 °C;
- Max rider weight: 120 kg
- Made in Italy & 2-year warranty