The 4iiii Precision 3+ Left Crank Arm ULTEGRA Powermeter - 8100 is a single-sided cycling power meter designed for accurate measurement of left leg power output. It is intended for road cyclists seeking to monitor and analyze their performance data during training and competition. This model is compatible with Shimano ULTEGRA 8100 series cranksets.

• Single-sided power measurement on the left crank arm
• Compatible with Shimano ULTEGRA 8100 series
• Uses 3-axis strain gauge technology for power data
• Bluetooth and ANT+ wireless connectivity
• Factory calibrated for accuracy
• Battery type: CR2032 coin cell
• Water-resistant construction
• Lightweight design with minimal added weight
• Firmware updates available via 4iiii app

This power meter is suitable for riders who require precise power data without replacing the entire crankset. Installation requires compatibility with the specified crank arm model.

Available Variants:

170mm:
172.5mm:
175mm: