4iiii Precision 2 Ultegra R8000 Left Hand Power Meter Crank

4iiii Precision Power Meter cranks are a highly accurate, reliable, durable and lightweight way of measuring your power and cadence during training or competition. With the capacity to measure tri-axial strain on your crank arm, the accuracy of the power readings is second to none. 

Whether you're a professional or a person who wants to train harder, this crank arm is a valuable tool for monitoring performance and helping you push yourself to the next level. 

Compatible with ANT+ and Bluetooth devices. Single left Shimano R8000 Ultegra crank arm supplied with 4iiii Precision unit ready installed. Easy to fit yourself and the calibration process is simple. 

Features:

• 3D power meter technology measures tri-axial strain on crank arm
• Accurate, consistent data
• Lightweight, compact design
• Battery status indicator via 4iiii app
• Compatible with ANT+, Bluetooth devices
• User-friendly app and configurable rider compensation scale factor
• Easy setup and maintenance
• Over-the-air upgrade capability for adding new features and updates

Specifications:

• Crank: Shimano Ultegra R8000
• Data accuracy: +/- 1% error margin
• Battery life: 100+ hours on 2032 coin cell battery
• Battery status indicator: Alert at 15% battery power
• Check your frame clearance before you order by downloading and printing the compatibility guide here.