SRAM's light, stiff, and durable direct mount RED X-Sync Aero chainrings let you pick the exact gearing you want and quickly swap sizes. X-Sync technology keeps the chain where you need it to be, too. X-Sync wide-tooth, narrow-tooth chainring technology provides maximum chain control. Laser-etched chainring finish is more durable than previous version. X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear. Improved aerodynamics for time trial and triathlon. Item Specifications: Tooth Count: 46, Drivetrain Speeds: 12, Round or Oval: Round, Offset: 6.5, Material: Aluminum, Color: Black, Defined Color: Black, Direct Mount Type: Direct Mount SRAM 8-Bolt,