4iiii

Precision 3+ Power Meter 105 7100

The 4iiii Precision 3+ Power Meter for Shimano 105 R7100 delivers reliable, repeatable power data for structured training, pacing, and long-term fitness tracking—without adding bulk to the crank. With ±1% accuracy, dual wireless protocols, and an exceptionally long runtime on a simple coin-cell battery, it’s built for riders who want consistent metrics with minimal maintenance.

A key differentiator is built-in Apple Find My support: when the bike is parked and the meter isn’t in use, it can be located on a map through Apple devices—useful for travel, storage, and day-to-day peace of mind.

Training-focused advantages that matter on the road

1. Apple Find My integration - Helps locate the power meter through the Find My app on iPhone, iPad, Mac, or via the Find Items app on Apple Watch when it’s not in use
2. ±1% power accuracy - Supports consistent pacing and comparable training data across rides and seasons
3. Up to 800 hours on a CR2032 - Long service intervals with a common, user-replaceable coin-cell battery
4. ANT+ and Bluetooth connectivity - Pairs with a wide range of head units and training apps for flexible setup
5. Lightweight, low-profile design (9 g) - Keeps the bike’s feel and crank clearance close to stock while adding power measurement
6. Broad measurement range - Transmits watts, cadence, and calories with a 30–170 RPM cadence range and 0–4000 W power range

Built for real-world riding, the Precision 3+ is specified as waterproof and includes an indicator light for at-a-glance status. It’s also backed by a 3-year warranty for long-term confidence.