The 4iiii Precision Power Meter for Shimano Ultegra 6800 cranks is a pre-installed power meter on a Shimano Ultegra left hand crank arm. This allows you to simply replace your left-hand crank arm and you’re ready to ride.
Precision is the world’s lightest left side power meter, designed provide you with industry leading power accuracy with highly dependable cadence data, a light weight design, broad ANT+ and Bluetooth smart head unit compatibility and 3D power meter technology capable of measuring tri-axial strain on your crank.
Garmin Vector 3
Dual-sensing Pedal-based Power Meter
Installs like any other pedal and quickly transfers between bikes
Measures total power, left/right balance, cadence and cycling dynamics
Sleek design provides greater cornering clearance and improved stack height
Fully integrates with Garmin cycling ecosystem for data analysis
Allows for easy updates via compatible Edge® cycling computers, ANT+® connectivity or Bluetooth®-enabled fitness devices¹ and Garmin Connect™ Mobile app