SRAM's most advanced aluminum cranks meet their most accessible power measurement. Get the data you need to progress integrated into a light stiff and strong crankset that features our X-Range shifting.Spindle-based power meter unit measures left side power to calculate total wattsLong battery life (400+ hours) to power a season of rides (User replaceable AAA lithium battery)IPX7 waterproof to 1 meter for 30 minutesModern aluminum crankarms and aluminum 2x chainring optimizes stiffness to weight ratio with material only where it's neededX-Range gearing technology gives you more range and a smoother gear progression so you're always in the right gear2x aluminum intergrated chainring offers crisp and accurate front shiftsDUB bottom bracket adds durability and simplicity (Bottom bracket sold separately)45mm chainline