Force just got faster. The lighter and stiffer Force 1 carbon crank is paired with SRAM's Aero 1x chainring offers improved aerodynamics, while the X-Sync wide/narrow-tooth technology provides maximum chain control. Put the power into your pedal stroke while chasing segments and racing TTs with greater ease and confidence.Single-ring drivetrain simplifies functionality and reduces weight. Direct mount aero chainrings for better aerodynamics. Carbon crank arms and aluminum 50t X-Sync aero chainring results in a lighter weight, stiffer, more durable crankset. DUB bottom bracket adds durability and simplicity (Bottom bracket sold separately). 45mm Chainline. Item Specifications: Rings, 50, Number of Chainrings, Chain Retaining Single, Drivetrain Speeds, 12, Drivetrain Speeds, 13, Chainring.