Sram`s lightest, stiffest, and most accurate integrated power meter just got lighter with a new carbon crankarm constructionPower readings are accurate within +/-1.5% and arent affected by climate conditions during a rideUltra-light hollow carbon fiber crankarms are 29 g lighter than previous generationPower meter is fully integrated into the chainring for lighter weight and greater accuracyDirect mount X-SYNC chainring is aero and incredibly long-lastingDUB bottom bracket adds durability and simplicityMeasures right and left leg power balance172.5x50DUBBLKDirect Mount1x12UPC/EAN/GTIN: 710845899089