Here's what Pearl say about the P922:
Holding with the tradition of superior pedal technology Pearl provides, the P920/922 has solid features with unique Pearl function. Some of these new features include a newer, smoother streamlined single chain drive, which offers a new level of speed for chain-driven pedals.Additionally, the P920/922 comes standard with Duo-Beater, Pearl’s patented PowerShifter function, and is available as both single and double models.
- Power Shifter series
- Single-chain drive
- Base plate
- Optimal running characteristics