Posted on March 9, 2022 by Jordan Villella
Canadian powerhouse 4iiii Innovations just cut the weight of their crank arm-based power meter pod in half. The new PRECISION 3 power meter weighs in at a super-light 9g for the pod, blowing the already-light PRECISION Pro (25g for the pod) out of the water.
Being the lightest is fine, but it only matters if the data is correct and the product is easy to use. On paper, the new PRECISION 3 has all the same features as its predecessor and beefs up all categories.
The new PRECISION 3 offers a staggering 800 hours of battery life (up from 100hrs), a more comprehensive cadence range, a broader temperature/storage temp range, and a slimmer design. This unit is a significant upgrade from the previous models from the stats alone.
One of the significant features of the 4iiii meters is their super slim design. The new meter takes the 7.5mm height (how much it sticks out from the factory crankset) and trims it down by 2mm to just 5.5mm— 40% thinner. This ease of clearance means adding a power meter to your Trek, BH, and other bikes with a tight crankarm/frame clearing could be a non-issue.
The PRECISION 3 power meter unit is available for 4iiii factory install on most alloy non-drive side cranks. There isn’t any explicit mention of a dual-sided meter, though we can only imagine this unit has a drive-side partner coming if not already available.
As for the inner workings of the 4iiii, PRECISION 3 boasts 8x more battery life, active temperature compensation, over-the-air firmware upgrades, and LED status indication for wake up (green), zero offset (blue), and low battery (red — which you won’t see for a very long time).
The PRECISION 3 uses the same patented 3D Strain Gauge technology from the PRECISION Pro to achieve +/- 1% accuracy with a 3-year warranty, and a solid customer service team (we’ve called before).
The PRECISION 3 Powermeter is pre-installed as a ride-ready option on a left side Shimano crank, or you can also send in your crank for a custom 4iiii Factory Install. Both options start at $324.99.
Accuracy : +/- 1% Battery type: CR2032 Battery life: up to 800 hours Waterproof rating: IPx7 Cadence range: 30-170 RPM Power Range: 0 – 4000W Unit Length: 63.79mm Unit width: 26.42mm Height 5.5mm Weight 9g Operating Temperature: 0 to 50°C Storage Temperature: 40 to 60°C Communication Protocols: ANT+, Bluetooth
For more information check out: 4iiiii.com
Jordan Villella is a staff writer for BikeRumor.com, specializing in cross country mountain, gravel, road, and race tech. He has been writing about the bicycles and bike culture for over ten years with no signs of stopping.
Prior to BikeRumor, Jordan raced at the professional level and wrote for MTBR and now-defunct Dirt Rag Magazine. He’s covered races, including World Championships and World Cups — where he loves to report what the pros are riding.
Based in Pittsburgh, PA — Jordan spends his time coaching cyclists of all abilities with Cycle-Smart, racing bikes around North America, and adventuring with his family.
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You guys are missing one ‘i’ in the 4iiii naming (supposed to be 4, not just 3), which lead to me missing your article on a Google search. This is true in the heading and body of your article. Worth correcting that when you can.
Thanks for the heads up! Fixed.
@Zach Overholt… You should charge $250 for buying a vowel like on Wheel of Fortune. 🙂
That, or 4iiii would be the hardest Wordle ever!
7.5mm -> 5.5mm is 26.67% thinner, not 40% thinner. You are using 7.5 as the reference, not 5.5, because that is the result of the equation. Bikerumor “Engineers” can feel free to pipe up and tell me how wrong this is.
(V1-V2)/((V1+V2)/2) * 100 = 7.5-5.5/((7.5+5.5)/2)*100 = 2/(13/2)*100= 30.76%
Tony is correct, the change is from 7.5. 26.67% of 7.5 is 2. 7.5 – 2 is 5.5. Therefore it is 26.67% lighter than 7.5.
It appears you just did 1-(5.5/7.5)*100=26.6 which is not the right way to do the percent difference. See my response below.
Hey guys, minor typo – “Storage Temperature” is from 440 to 60 deg C? That might need correction methinks.
Otherwise…wow. That power efficiency trickery is impressive if they’ve got the battery life lasting 800 hours from the 100+ of the second-generation model I have (which I am very happy with BTW).
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