SRAM FORCE D1 WIDE 165x40 DM DUB NoBB GLOSS-BKSingle ring drivetrain simplifies functionality and reduces weight Non aero chainrings can be installed with a single tool, making gearing changes a breeze X Sync wide tooth, narrow tooth chainring technology provides maximum chain control DUB bottom bracket adds durability and simplicity Aluminum chainring with carbon crank arms Can be upgraded to a power meter Compatible with all Sram Road Wide DUB BB`s (not included)