Single-ring drivetrain, with X-Sync chainring simplifies functionality and reduces weightSram X-Sync narrow/wide chainring technology provides maximum chain controlDirect mount chainrings are lighter and stiffer than traditional spider-based ringsUpdated black and iridescent grey colorway and graphicsDUB bottom bracket adds durability and simplicityCan be upgraded to a power meter175x40DUBBLKDirect Mount1x12UPC/EAN/GTIN: 710845891991