• Upgrade standard (non-Wide) Rival D1 cranksets to power meter cranksets.
• Replaces non-drive crank arm and spindle. Uses existing drive side arm and chainrings.
• DUB bottom bracket adds durability and simplicity
• DUB-PWR spindle-based unit measures left side power to calculate total watts
• Long battery life to power a season of rides
• User replaceable AAA battery
• SRAM Model ID: PM-RIV-ASSY-D1