4iii Precision 105 5800 Powermeter
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4iii Precision 105 5800 Powermeter
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Code: FC-5800-PML100
4iiii Precision 105 5800 Left Arm Powermeter
Accurate measurement of cycling effort is vital for anyone who takes cycling seriously. PRECISION powermeters provide industry leading accuracy, together with reliable cadence data. PRECISION 3D technology is capable of measuring tri-axial strain on the crank arm, ensuring the accuracy of the measurement. Designed to work flawlessly with Bluetooth and Ant+ head units, PRECISION powermeters offer an accurate, lightweight, durable and affordable method of measuring rider power.    
PRECISION power meters are installed on a new Shimano left crank arm (105, Ultegra, or Dura-Ace). These crank arms will fit bottom brackets using the Hollowtech ii format.
  • 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
  • Weight: 9 grams
  • Data accuracy: +/- 1% error margin
  • Battery life: 100+ riding hours on 2032 coin cell battery
Note: Check your frame clearance before you order by downloading and printing the compatibility guide Click Here
Geoff Have been using the 4iiii Powermeter for a full year now on my winter bike and has performed faultlessly in all weather conditions as well as indoors on Zwift / Sufferfest. Would highly recommend.
James Easy to install and use, now I just need to get fitter and understand what its telling me.
TR Perfect! Connected with Sigma ROX 10.0 , computer and Android phone with no issues.
Marc Better than Stages.
Mr Morais The best powermeter at the best price (even if you purchase it from another country, which is my case).
Mr Pillay Easy to install. Used it for a week now and everything is good. Great value for money.
Steve A great addition to my heart rate monitor for gauging my efforts, especially up categorised hills, for when I'm trying to improve PBs or pace myself for a longer ride.
Mr Cook I couldn't believe it when, after placing my order from South Africa around midday on the Wednesday I got a call from the UPS courier on Friday morning at 11:00 informing me he was 5 minutes away from my office with the delivery! This absolutely made the experience for me. EXCELLENT SERVICE. As for this 4iiii Precision Power Meter I have been using it for a couple of weeks now - Very easy and quick to set up and also comes with an extra battery - it's the small things that make a difference. 4iiii are definitely onto something good here - this is about half the price of the Stages left crank power meter. Great value for value and cannot fault it.
MR.F Delivery was very fast. The device itself was installed and setup with the vendor app within minutes. Everything works just fine. The powermeter wakes up after 3-4 pedalstrokes and sends data to my headunit. I can fully recommend the product for now.
Grzegorz Good power meter with good price. Running flawless with Wahoo Elemnt Bolt.
Mr Richardson Great add on if you are looking to improve your training routine, very simple to intergrate with your garmin or smart phone, really great tool to add to your training program, so easy to calibrate by smatphone or garmin device.
Mr Yazman I was orderin for my racer friend. It was easy to install, pair in seconds to Garmin 520, I even tried when in the box at my gsm telephone via bluetooth, my gsm found it immediately. After we install to my friends bike easy to calibrate, took about 10-15 seconds via Garmin and ready to go... The powermeter is very sensitive, very high quality totally recommend, it is the best single side powermeter option on the market pricing value was good.
Mr Allen Great product. Easy to install and set up in about 5 minutes. As accurate as one can expect with a left side only crank arm but that's all I need anyway.
Mr glynn This is quick to install and works perfectly. Pairing with my computer took seconds and the power readings appear to be just as accurate as my other, far more expensive, meter on my race bike.. Being Shimano it fits any of their Hollowtech road cranks, which are all interchangeable.
Oscar Works well - Great value compared to the other options out there.