An accurate and reliable power meter is essential for tracking and improving your cycling performance. In this review, I dive into the details of the 4iiii Precision 3+ GRX single sided power meter that stands out for its impressive accuracy while pedalling, but exhibits some inconsistencies when coasting on gravel – the very terrain it should excel on.
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Tech Overview – Precision 3+ Power Meter GRX NDS
● Type: Crank Based Power Meter (Shimano Left / Single Sided)
● Wireless Data: ANT+, Bluetooth Smart.
● Battery: 1x CR2032 / ‘Up To’ 800hrs.
● Power Measurement: Left Power (Doubled), Cadence.
● Power Accuracy: ±1% (Claimed)
● Power: 0-4000W
● Cadence: 30-170RPM (Accelerometer. No magnet required)
● Active Temperature Compensation: Yes
● Waterproofing: IPX7
● Firmware: Upgradable via 4iiii App.
● Weight: 9g Pod.
● Profile: 5.5mm
● Warranty: 3 years.
● Misc:
– Apple Find My Network Compatible
– Terrain Sensing Mode
Video Index:
0:00 Intro
0:52 Precision 3 Timeline
2:08 Technical Specifications
3:09 Price (GRX FC-RX810)
3:21 Installation
3:28 Frame Compatibility
3:51 Observed Issues
4:06 Favero Assioma PRO MX (Comparison Baseline)
4:52 Data Review – Indoor
6:46 Data Review – Outdoor
9:29 Data Review – Recording Device Test
10:12 Data Review – Precision 3+ Pro Dual Test
10:56 Summary and Commentary
12:25 Wrap Up
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#4iiii #PowerMeter #Cycling