A single chainring with a wide-range cassette is a wonderfully clean way to tackle so many disciplines. Gravel, TT, tri or crits: just pick the right chainring size and go. Lightweight and strong direct mount chainrings feature X-SYNC tooth technology to maximize chain retention, and they bolt to carbon arms with a spectacular but subtle finish. Single-ring drivetrain simplifies functionality and reduces weight Direct mount chainrings are lighter and stiffer than traditional spider-based rings SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control DUB bottom bracket adds durability and simplicity Can be upgraded to a power meter SRAM Model ID: FC-FRC-1-D2 Attributes BB Inclusion No BCD Direct Mount Chainline 45mm Crank Spindle Diameter 28.99mm Crankset Material Carbon Drivetrain Spacing Road Disc Interface DUB Pedals Thread 9/16'' Primary Color Black Speed 12 Teeth 40