Provides riders with accurate, live power data delivery housed in SRAM's most advanced aluminum crankset- Power meter technology is integrated through what is called "DUB-PWR", a unique design that elegantly houses Quarq's reliable and accurate power measurement inside the DUB crank spindle itself- Measuring left-side power to calculate total watts, it's subtle, lightweight, compatible with any chainring setup, and boasts unbeatable battery life- Compatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled components- BB and BB DUB spacers are not included- 2-Guards