The choice of SRAM's top professionals their lightest stiffest and most accurate integrated power meter and chainring combo just got lighter with a new carbon crankarm construction. The SRAM power meter is accurate to +/-1.5% and isn't affected by temperature changes and the consistent 13-tooth gap on the rings ensures fast and reliable shifting. SRAM's integrated rings are also incredibly long-lasting. Plus they're offering more crankarm lengths than ever before to ensure this crank works for you.Power meter is fully integrated into the chainring for lighter weight and greater accuracyPower readings are accurate within +/-1.5% and aren't affected by climate conditions during a rideMeasures right and left leg power balanceOne-piece 2x chainring results in a lighter weight stiffer more durable crankset29g lighter than the previous generationX-Range gearing technology gives you more range and a smoother gear progression so you're always in the right gearDesigned to deliver crisp and accurate front shiftsUltra-light hollow carbon fiber crankarmsDUB bottom bracket adds durability and simplicity (Sold separately)45mm Chainline