Upgrade your mountain bike with the gold standard in power measurement. The 4iiii Precision 3+ power meter, pre-installed on a Shimano XTR M8200 left crank arm (170 mm), delivers the perfect balance of weight, stiffness, and data accuracy.

The Precision 3+ is the most advanced unit 4iiii has released to date. With an accuracy of ±1% and an impressive battery life of up to 800 hours, you can rely on consistent, trustworthy data on every ride. New to this “+” version is support for Apple Find My, making it easy to locate your bike via your iPhone or iPad should it ever be lost or stolen.

Thanks to the sensor’s ultra-low profile, frame compatibility is maximized—even on bikes with tight chainstay clearance.

Key Features

Apple Find My: Integrated tracking via the Apple network

Battery life: Up to 800 hours on a standard CR2032 battery

Accuracy: Class-leading ±1% variance

Lightweight: Adds only 9 grams to the lightweight XTR crank

Waterproofing: IPX7 certified, built to withstand heavy mud and bike washes

Terrain Selector: Optimized cadence measurement for both smooth roads and rough terrain