SRAM Rival Powermeter Arm/Spindle E1

• 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

Attributes