- XX crank arm with a subtly integrated power meter to record and deliver live, accurate power readings to your head unit - Utilizes 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 component - BB and BB DUB spacers are not included - 174mm Q-Factor - 2-Guards