On the technical side, the S1 provides impressive precision for such a small package. It hits a 1% power accuracy rating, which is generally what you'd expect from top-tier equipment. It manages this through a 16-bit high-precision ADC and a multi-range dynamic torque calibration system that keeps the data consistent as your power output fluctuates, to make sure the numbers on your screen are actually useful.


One of the best practical perks is the charging. Instead of hunting for specialized coin batteries or weird magnetic connectors, you just plug it into a standard USB-C cable. It’s also built to handle real-world conditions with an IPX7 waterproof rating, so it won’t quit on you during a downpour. For those who ride on gravel or less-than-perfect pavement, the 6-axis gyroscope offers millisecond-level response times to keep your cadence measurements from jumping around.