SRAM, Rival D1 Quarq Left Arm/Spindle, Power Meter Crankset, Speed: 12, Spindle: 28.99mm, DUB, 160mm, Black, Road Disc

• 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