SRAM X-Sync Road Direct Mount Chainring for RED/Force - 40t, 12-Speed, 8-Bolt Direct Mount, GraySRAM X Sync Road Direct Mount Chainrings for RED and Force drivetrains feature a wide tooth, narrow tooth design to provides maximum chain control. SRAM X SYNC wide tooth, narrow tooth chainring technology provides maximum chain control Laser etched chainring finish is more durable X Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear Item Specifications Defined Color Gray Direct Mount Type