New To Sigma Sports?
£10 off £100* - code SIGNUP10
£25 off £250* - code SIGNUP25

4iiii PRECISION 2.0 Ultegra R8000 Left Arm Power Meter

★★★★★ ★★★★★

No Colour

PRECISION 2.0 Ultegra R8000 Left Arm Power Meter
Email Me When Back in Stock

We're sorry, but unfortunately, we're unable to ship this item to your country

Product ID: 842038

Made to offer you a highly accurate and dialled in set of data on your power output, the 4iiii PRECISION 2.0 Ultegra R8000 Left Arm Power Meter is ideal for the rider wanting to take to the road and train with a better level of response.

Communicating via ANT+ and Bluetooth Smart to your head unit, this power meter has a battery life that exceeds 100 hours, and paired with its slim profile on your crank arm, this is a great choice for anyone powering onwards.

4iiii PRECISION 2.0 Ultegra R8000 Left Arm Crank Arm

Riding with power is the new norm for dedicated and committed cyclists and with the 4iiii PRECISION 2.0 Ultegra R8000 Left Arm Power Meter offering a reliable, simple, and intuitive operation and installation, it's never been easy to get the data and numbers you need to ride and train at your limit.

Offering up a high-quality sensor that detects the tri-axial strain on the left crank arm within a range of plus or minus 1%, you can be sure to benefit from a dialled in the measurement of your power. With an accurate and consistent data set being transmitted via ANT+ and Bluetooth Smart networks, this power meter simply fits into your current cycle computer set up without a fuss. Lightweight and compact at just 90 grams, the sensor comes embedded into the side of the supplied left crank arm.

Compatible with Shimano Ultegra R8000 groupsets, this power meter is ready to offer up a 100+ hour battery life. Pairing with your phone easily thanks to a user-friendly app, you can recalibrate and perfect your data at a moment's notice. Simple and intuitive, this is a great choice for any rider wanting to begin their power metered experience on the road.


To check whether the 4iiii power meter will be compatible with your frame, please consult these instructions. Still unsure? Feel free to reach out to us for assistance.


  • 3D power meter technology (patent pending) measures tri-axial strain on your crank arm
  • Accurate, consistent data
  • Lightweight, compact design
  • 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
  • Battery status indicator via 4iiii app
  • Battery life: The easily replaceable CR2032 battery gives 100+ hours (riding time)
  • Compatibility: Shimano Ultegra R8000 cranksets

Close menu