SRAM Rival 1x XPLR 12/13-Speed Wide Crankset E1Modern aluminum crankarms and chainring optimizes stiffness to weight ratio, with material only where its needed X Sync wide tooth, narrow tooth aluminum chainring technology provides maximum chain control Wide chainline for compatibility with Full Mount rear derailleurs Longer DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for unmatched cross compatibility across brands DUB bottom bracket adds durability and