SRAM Rival 2x Powermeter E1 Power Meter Crankset Speed: 12 Spindle: 28.99mm BCD: Direct Mount SRAM 8 Bolt 48/35 DUB 160mm 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 fro TECH SPECS