- Upgrade your existing Rival E1 crankset with spindle based power
- Spindle-based unit measures left side power to calculate total watts
- Long battery life (400+ hours) to power a season of rides
- User replaceable lithium AAA battery
- Lightweight (less than 40g heavier than standard crankset)
- SRAM Model ID: PM-RIV-ASSY-E1
UPC: 710845915413