Sram: SRAM 1X is the only one you need: less weight, better chain control and the ability to sync up with any riding style. Our 1X drivetrain philosophy focuses on optimizing how components work together- crank to ring, tooth to chain, shifter to derailleur, derailleur to cassette, and cassette to wheel. No matter where you ride, no matter what you're up against, SRAM 1X takes you further.Make SRAM 1X even better with the simplicity of the new SRAM X-SYNC Direct Mount chain ring. Engineered in Germany, the new Direct Mount rings bring lighter weight and greater simplicity to XX1, X01, X1-1400, and GX-1400 cranksets. SRAM's Direct Mount rings give riders the perfect opportunity for a serious upgrade.