Size: 170mm Cutting-edge design meets seamless performance for cycling enthusiasts in the PES-P505 Base Power Meter. With its sleek design and advanced technology, the P505 ensures a pro-level experience, delivering unmatched stiffness and smooth shifting. The user-friendly operation adds a touch of comfort to your cycling adventures, making every ride a breeze. Embrace the passion of pedaling with this power meter's excellent performance and universal compatibility, providing you with precise and reliable power data on the go. Built for the toughest challenges, the PES P505 Base power meter was put through rigorous testing in demanding environments, guaranteeing an impressive +/-1.5% power accuracy. Versatility is at the heart of its design, featuring a widely popular 110BCD four-bolt specification that reduces weight and enhances compatibility. The package includes both the power meter and crank, eliminating the hassle of selecting a compatible crank. Plus, with a 24mm steel spindle, SHIMANO users can effortlessly install it without the need to replace the bottom bracket. Elevate your cycling experience with the PES-P505 Base Power Meter – precision, performance, and compatibility in one sleek package. Weight: 650g Crank options: 165mm, 170mm, 172.5mm, 175mm BCD: 4x 110mm Spindle: 24 mm - Shimano Q-Factor: 147mm Data Functions: Power, Cadence, Left-Right Balance, Pedalling Smoothness Power Accuracy: +/-1.5% Power Range: 0 ~ 2500w Cadence Range: 20 ~ 200rpm Calibration: Automatic, Backpedal & Manual Calibration Wireless Protocol: ANT+, Bluetooth Water Resistant: IP67 Battery Life: 200 Hours Charging: Magnetic Charging