Garmin Rally RS110 Single-Sensing Πετάλια Power Meter

For road cyclists chasing precise left-leg power data without the complexity of dual-sided systems, the Garmin Rally RS110 mounts like a standard pedal and quietly records every watt through its spindle-based sensor. Clip in with Shimano SPD-SL cleats, pair over ANT+ or Bluetooth, and watch your numbers on a Garmin Edge or compatible head unit.

Key specifications

• Single-sided power measurement (left pedal only)
• Power accuracy: ±1.0%
• Battery: LR44/SR44 (x4) or CR1/3N (x2), up to 120 hours
• Connectivity: ANT+ and Bluetooth Smart
• Cleat compatibility: Shimano SPD-SL (3-bolt road)
• Q-factor: 53 mm (55 mm with included 2 mm washer)
• Stack height: 12.2 mm
• Maximum rider weight: 105 kg (231 lbs)
• Water resistance: IPX7
• Adjustable release tension and field calibration
• Pedal body: composite; axle: CNC machined chromoly steel
• Thread: 9/16" x 20 TPI
• Metrics: power (watts) and cadence (RPM)
• Upgradeable to dual-sensing Rally RS200

Why choose it

The Rally RS110 delivers reliable, accurate power data from the left pedal, making it an ideal entry point into power-based training. Its tool-free installation and familiar SPD-SL interface mean you can swap it onto any road bike in minutes. With IPX7 waterproofing and a robust chromoly axle, it stands up to wet rides and hard efforts. When you're ready to go dual-sided, simply add a Rally RS200 right pedal—no need to replace the entire system.

Ideal use cases

• Structured interval training and pacing
• Tracking training load and intensity
• Racing with live power data on a Garmin Edge
• Indoor training on smart trainers or rollers
• Upgrading an existing SPD-SL bike without changing cleats

Good to know

Software updates are delivered via the Garmin Connect app. The pedal ships with cleat hardware and a 2 mm washer to fine-tune Q-factor. For dual-sided power, pair with a Rally RS200 right pedal (sold separately).