Ultra-light hollow carbon fiber crankarms are 29 g lighter than previous generationX-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain controlSingle-ring drivetrain simplifies functionality and reduces weightDirect mount aero chainrings for better aerodynamicsDUB bottom bracket adds durability and simplicityCan be upgraded to a power meter172.5x50DUBBLKDirect Mount1x12UPC/EAN/GTIN: 710845898785