How do the stack heights of the P1 and Single-Sided Pedals compare to other pedals? The stack height of the P1 and Single-Sided Pedal power meters are 14mm, which are about 3-5mm greater than some of the other popular pedal systems on the market. Related articles P1S Upgrade Procedure What type of battery do the P1 and Single-Sided Pedal need? Rival Power Meter Firmware 1.2.7 Bug Fix What's the difference between how ANT+ and Bluetooth read data from the P1 Pedals? Where can I find parts drawings for my PowerTap power meter?