The 4iiii PRECISION 3+ Ride Ready power meter for Shimano Ultegra R8100 in 165mm is designed for cyclists seeking precise, repeatable data without altering their bike's natural feel. Installed on the non-drive-side crank arm, this compact system supports road training, racing, and endurance rides, providing accurate power, cadence, and training metrics via ANT+ and Bluetooth Smart. Using patented 3D strain-gauge technology, it measures power with ±1% accuracy and features Automatic Terrain Selector for responsive feedback across varied road conditions. The module weighs only 9 grams with a profile of 5.5mm, ensuring minimal impact on bike aesthetics. A replaceable CR2032 coin cell offers up to 800 hours of use, reducing battery changes over a season. Compatible with Apple Find My, it allows location tracking when not in use. IPX7 rated for water resistance and backed by a 3-year warranty, it withstands wet weather and demanding training environments, making it a reliable upgrade for serious cyclists in India.