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. FEATURES: 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 SPECS: Material: Aluminum Round or Oval: Round keyword search: AXS Chainline/Hub Compatibility: 130 Hubs , 135/142 Road Disc Hubs < 415 mm Chainstay Direct Mount Type: Direct Mount SRAM Tooth Count: 48 Ring Position/Type: Chain Retaining Single Ring Drivetrain Speeds: 12 Chainring BCD: Direct Mount SRAM