SRAM, Rival 2x Powermeter E1, Power Meter Crankset, Speed: 12, Spindle: 28.99mm, BCD: Direct Mount SRAM 8 Bolt, 48/35, DUB, 172.5mm, Black, Road

• Spindle-based unit measures left side power to calculate total watts
• Long battery life (400+ hours) to power a season of rides
• User replaceable AAA lithium battery
• Lightweight (less than 40g heavier than standard crankset)
• Crisp and accurate front shifts
• Integrated one-piece chainrings
• SRAM Model ID: FC-RIV-P-E1