SRAM, Rival 1x XPLR Powermeter E1, Power Meter Crankset, Speed: 12/13, Spindle: 28.99mm, BCD: Direct Mount SRAM 8 Bolt, 42, DUB, 172.5mm, Black, Road

• Light and accurate spindle-based power unit nestles into redesigned arms to give you the data you need • 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) • Wide chainline for compatibility with Full Mount rear derailleurs • SRAM Model ID: FC-RIV-1WP-E1