Rival D1 Quarq Wide Left Arm/Spindle, Power Meter Crankset, Speed: 12, Spindle: 28.99mm, DUB, 172.5mm, Black, Road Disc

* Upgrade 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