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4iiii Precision 3+ left crank with wattmeter, Shimano GRX810

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4,6/5

4iiii Precision 3+ left hand crank with wattmeter

The 4iiii Precision 3+ power meter is the result of the development and experience of the leader in the field of measuring watts on cranks. As the only cycling product on the market, it offers native integration with Apple Find My technology.

Precision 3+ can offer you everything you expect from a modern power meter - measurement reliability, long battery life and simple management via a smart application. Precision 3+ is compatible with all commonly used cycling computers supporting the ANT+ protocol (Garmin, Wahoo, Bryton, Lezyne,...).

Product features

The lightest mass-produced wattmeter
Simple battery replacement without tools
Integrated accelerometer for measuring cadence (pace)
Wireless firmware updates via Bluetooth Smart interface
Innovative housing made of highly chemically resistant plastics (more resistant when washing)

Product details

Accuracy 99 %
Temperature range 0 - 50 °C (accuracy guaranteed in this range)
Performance range measurement 0-4000 W
Water resistance IPX 7
Connectivity ANT+
Dimensions 63.79 x 26.42 x 5.5 mm
Scope of term 30-220 revs
Weight + 9 g on the left crank compared to the version without a wattmeter
Battery CR2032 (lifetime 500-800 hours)
product ID 234445

Rating 4,6/5

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This Canadian brand is primarily known for its powermeters that could be seen on the World Tour. Their offer also includes heart rate sensors and a smart bike hometrainer. Their prices are reasonable. By the way, you are supposed to read their name as "Four Eyes".

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