4iiii presents the next generation of crank arm-based power meters, the Precision Ride Ready Dual Power Meter Dura Ace FC-R9100. It still has the same +/-1% claimed accuracy 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 more user-friendly. The biggest functional change is the claimed battery life, which 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 Precision Ride Ready Dual Power Meter Dura Ace FC-R9100 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 Precision Ride Ready Dual Power Meter Dura Ace FC-R9100 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 Precision Ride Ready Dual Power Meter Dura Ace FC-R9100 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 Ride Ready Dual Power Meter Dura Ace FC-R9100 is both ANT+ and BLE compatible
• Offers up to 800 hours of battery
• Active temperature compensation to maintain accurate readings
• Lightweight, compact design
• Battery status indicator via the 4iiii app
• Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products
• User-friendly app and configurable rider compensation scale factor
• Easy setup and maintenance