4iiii presents the next generation of crank arm-based power meters, the Precision 3. It still has the same +/-1% claimed accuracy as the previous version and is still one of the most affordable options for cyclists, but it now runs far longer than before per battery. It is smaller and it’s more user-friendly. The biggest functional change is the claimed battery life. It has climbed from a competitive 120 hours to a whopping 800 hours from a standard CR2032 coin cell, nearly a 7x improvement. While the run time has grown substantially, the physical casing attached to the back of the crank arm is almost half the thickness for better compatibility with more frames.

3D ACCURACY: 4iiii Precision 3 has the same +/-1% claimed accuracy and is still one of the most affordable options on the market, but it now runs far longer than before per battery. It is smaller and more user-friendly.

EASY INSTALLATION: 4iiii Precision 3 Ride Ready Power Metre Installation is super simple, and if you're running cycles with Shimano cranks then this is a pretty easy one for swapping between them. Yes, it's still not as simple as something like the Garmin Rally pedals, but it certainly isn't the hardest job.

WATERPROOF: The Precision 3 is rated as IPX7 waterproof which means you'll be safe to wash your bike and ride in the rain, assured that your power meter can handle the toughest conditions.

Specifications:

• Accuracy in 3D
• The lightest power meter on the market
• Compatible with more bike frames
• Performed a successful zero-offset
• IPX7 waterproof rating so you can be assured that your power meter can handle the toughest conditions
• Precision 3 Power Metre is both ANT+ and BLE compatible
• Ultegra R8100 crank left leg in 165, 170, 172.5, or 175mm
• Measures cadences of 30-170 RPM and power from 0-4,000 W +/- 1%
• CR2032 coin cell battery with up to 800 hours of life
• ANT+ and Bluetooth compatible
• IPX7-rated waterproof
• Operates between 0-50 °C (32-122 ° F)
• Weight: 9g (Not including crank arm)
• Active temperature compensation to maintain accurate readings