Whether you’re a pro or simply training hard, the 4iiii Precision Shimano Ultegra R8000 Left Crank powermeter delivers industry-leading accuracy and highly dependable cadence data. This lightweight and durable crank arm features 3D powermeter technology, measuring tri-axial strain. Compatible with ANT+ and Bluetooth head units, smartphones, and other 4iiii products, this powermeter also offers a user-friendly app with configurable rider compensation scale factor. The battery status indicator via the 4iiii app ensures you never miss a beat. Easy to set up and maintain, this crank arm is a must-have for any serious cyclist. 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