Pedal-based power meters for off-road (compatible with SHIMANO SPD cleats) install like any other pedals and quickly transfer between bikes; removable power sensor allows for use with Rally RS110 or RK110 road pedal bodies Single-sensing power meter tracks total power and cadence New strain gauge and gyroscope make these power meters highly responsive and +/- 1% accurate New force data provides insight into your performance and the relationship between power and cadence when used with your compatible Garmin cycling computers and smartwatches Pedal IQ smart calibration feature alerts you when you need to calibrate based on several factors, such as changes in temperature since your last calibration Redesigned, all-metal pedal bodies offer more clearance and improved durability Compatible with oval chain rings Rechargeable pedals offer up to 90 hours of ride time; quick charging gives you up to 12 hours of ride time with just 15 minutes of charging; travel mode lets you put pedals to sleep to conserve battery during transport