4iiii is a Canadian company based in Cochrane, Alberta, founded by Jim Rooney and Kip Fyfe in 2010. Jim and Kip were the founders of Dynastream, the company that created the ANT+ wireless technology that most cyclists are familiar with. In 2006, Garmin acquired Dynastream for $36 million in cash.
In recent years, 4iiii power meters have been used by World Tour teams such as Etixx-Quick Step, Bora Hansgrohe, and Israel Startup Nation.
Today, 4iiii is one of the leading power meter manufacturers. 4iiii makes the left and dual-sided power meter for Shimano crankarms (road, gravel, and mountain bike).
In this article, we’ll look at the differences between two of the most popular models; 4iiii Precision vs Precision 3.
Technical specifications
At first glance, both 4iiii Precision 3 and Precision looks very similar.
Here are the improvements made with the 4iiii Precision 3;
| Specifications | Precision 3 | Precision |
|---|---|---|
| Accuracy | ±1% | ±1% |
| Battery type | CR2032 | CR2032 |
| Battery life | 800 hours | 100 hours |
| Waterproof rating | IPX7 | IPX7 |
| Cadence | 30 – 170 rpm | 30 – 150 rpm |
| Max. power | 4000W | 4000W |
| Height | 5.5mm | 8mm |
| Weight | 9g | 9g |
Crankarm compatibility
4iiii Precision 3 and Precision are available for Shimano 11-speed groupsets (105, Ultegra, and Dura Ace), GRX and XT/XTR.
At the moment, there is no model available for 12-speed Shimano road groupset.
| Shimano crankarm | Crankarm length |
|---|---|
| Shimano 105 R7000 | 165, 170, 172.5, 175mm |
| Shimano Ultegra R8000 | 165, 170, 172.5, 175mm |
| Shimano Dura Ace R9100 | 165, 170, 172.5, 175mm |
| Shimano GRX810 | 170, 172.5, 175mm |
| Shimano XT M8100 | 170, 175mm |
| Shimano XTR M9100 | 170, 175mm |
More reading : Which Power Meter Fits A Shimano Crankset?
Where to buy
4iiii power meters are widely available for leading cycling retailers such as Competitive Cyclist, Bike24, Merlin Cycles, Sigma Sports, or from 4iiii.
The table below shows the recommended retail pricing (RRP) of each 4iiii model.
| Shimano crankarm | Precision 3 (USD) | Precision (USD) |
|---|---|---|
| Shimano 105 R7000 | $335 | $285 |
| Shimano Ultegra R8000 | $385 | $335 |
| Shimano Dura Ace R9100 | $490 | $440 |
| Shimano GRX810 | $385 | $335 |
| Shimano XT M8100 | $385 | $335 |
| Shimano XTR M9100 | $515 | $465 |
Alex Lee is the founder and editor-at-large of Mr. Mamil. Coming from a professional engineering background, he breaks down technical cycling nuances into an easy-to-understand and digestible format here.
He has been riding road bikes actively for the past 12 years and started racing competitively in the senior category during the summer recently.