* Elegant and secure direct-mount X-SYNC chainrings from the company that originated the 1x drivetrain for the ultimate in consistent chain control over the long haul.* Direct mount chainrings in 38t through 46t* DUB bottom bracket adds durability and simplicity* Wide chainline crankset to fit the biggest gravel tires* Longer DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for unmatched cross-compatibility across brands* Compatible with 135, 142 and Boost rear spacing* SRAM Model ID: FC-RIV-1W-D1