SIMPLE. VERSATILE. AFFORDABLE.Introducing:PowerTap P1s PedalsFor the last 17 years PowerTap has been creating the best power meters to give cyclists the edge that they’ve been yearning for. The latest addition to the PowerTap portfolio is the P1s a single-sided version of the worldrenowned P1 pedal-based power meter. The P1s represents a more affordable way to get the simplicity and versatility that P1 users have grown to love. Power output is calculated by measuring power from one side in this case the left side and doubles the value.IT'S LIKE CLIPPING YOUR FEET INTO TWO LITTLE LIE DETECTORS.These aren't ordinary pedals. The P1 pedal is a simple intelligent and uncompromising design that provides the same proven PowerTap accuracy and reliability. The simple one-piece design easily mounts to any crank and does not require calibration nor installation angle setting providing a true “plug-and-play” experience.The P1 also features dual band ANT+ and Bluetooth SMART for compatibility with a multitude of head units and smart devices. Plus the independent measurement opens the possibility for a new set of pedaling metrics previously unavailable to help give you the ultimate competitive edge.Features: Most advanced cycling power meter ever developed Easily swap between bikes for a vast range of compatibility Measures left power only and doubles that value for total power Weight: 398 grams Thread Type: 9/16' Cleat Interface: 3 bolt Cleat: Red 6 degree floating Spring Type: Adjustable Elastomer Proven PowerTap accuracy Release Tension: 6-20 Nm Stack Height: 14mm Center of Pedal: 53mm measured from crank to pedal Lean Angle: 25.5 degrees based on 175mm crank length 75mm BB drop and 147mm Q-Factor crank Firmware Updates: Over the air Connectivity: ANT+ and Bluetooth SMART Battery: AAA Lithium alkaline and/or rechargeable alkaline batteries not recommended for extended use Battery Life: 60 hoursPowerTap 2 Year WarrantyWe're proud to offer a 2 year warranty worldwide on all of our PowerTap branded power meters.