4iiii Dura Ace 9100 Left-Hand Crank with Precision 2.0 Power Meter

Whether you’re a pro or simply training hard, PRECISION powermeters deliver industry-leading accuracy, highly dependable cadence data, 3D powermeter technology capable of measuring tri-axial strain on your crank arm. Designed to be durable and lightweight, compatible with  ANT+ and Bluetooth head units, PRECISION helps you train harder and smarter.

PRECISION Ride Ready comes installed on a new Shimano left crank arm (105, Ultegra, or Dura-Ace). These crank arms will fit bottom brackets using the Hollowtech ii interface.

Key Features:

• 3D powermeter technology (patent pending) measures tri-axial strain on your crank arm
• Accurate, consistent data
• Lightweight, compact design
• Battery status indicator via 4iiii app
• Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products
• User-friendly app and configurable rider compensation scale factor
• Easy setup and maintenance

Specifications:

• Weight: 9 grams
• Data accuracy: +/- 1% error margin
• Battery life: 100+ riding hours on 2032 coin cell battery

Occasionally, without notice, manufacturers change product design and/or specifications.